SELECT 
  cscart_bm_snapping.grid_id as grid_id, 
  cscart_bm_snapping.block_id as block_id, 
  IFNULL(
    dynamic_object_content.content, 
    default_content.content
  ) as content, 
  IFNULL(
    dynamic_object_content.object_id, 
    default_content.object_id
  ) AS object_id, 
  IFNULL(
    dynamic_object_content.object_type, 
    default_content.object_type
  ) AS object_type, 
  cscart_bm_block_statuses.object_ids as object_ids, 
  cscart_bm_snapping.*, 
  cscart_bm_blocks.*, 
  cscart_bm_blocks_descriptions.* 
FROM 
  cscart_bm_snapping 
  LEFT JOIN cscart_bm_blocks ON cscart_bm_blocks.block_id = cscart_bm_snapping.block_id 
  LEFT JOIN cscart_bm_block_statuses ON cscart_bm_snapping.snapping_id = cscart_bm_block_statuses.snapping_id 
  AND cscart_bm_block_statuses.object_type LIKE '' 
  LEFT JOIN cscart_bm_blocks_descriptions ON cscart_bm_blocks.block_id = cscart_bm_blocks_descriptions.block_id 
  LEFT JOIN cscart_bm_blocks_content AS default_content ON cscart_bm_blocks.block_id = default_content.block_id 
  AND cscart_bm_blocks_descriptions.lang_code = default_content.lang_code 
  AND default_content.snapping_id = 0 
  AND default_content.object_id = 0 
  AND default_content.object_type like '' 
  LEFT JOIN cscart_bm_blocks_content AS dynamic_object_content ON cscart_bm_blocks.block_id = dynamic_object_content.block_id 
  AND cscart_bm_blocks_descriptions.lang_code = dynamic_object_content.lang_code 
  AND dynamic_object_content.object_id = 0 
  AND dynamic_object_content.object_type like '' 
WHERE 
  cscart_bm_snapping.grid_id IN (
    1, 2, 3, 4, 5, 6, 9, 7, 8, 12, 15, 20, 13, 14, 
    16, 17, 18, 19, 21, 22, 88, 89, 90
  ) 
  AND cscart_bm_blocks_descriptions.lang_code = 'en' 
ORDER BY 
  cscart_bm_snapping.order, 
  cscart_bm_snapping.block_id

Query time 0.00224

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "130.72"
    },
    "ordering_operation": {
      "using_temporary_table": true,
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "30.82"
      },
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_bm_blocks_descriptions",
            "access_type": "ALL",
            "possible_keys": [
              "PRIMARY"
            ],
            "rows_examined_per_scan": 67,
            "rows_produced_per_join": 6,
            "filtered": "10.00",
            "cost_info": {
              "read_cost": "14.50",
              "eval_cost": "1.34",
              "prefix_cost": "15.84",
              "data_read_per_join": "1K"
            },
            "used_columns": [
              "block_id",
              "lang_code",
              "name"
            ],
            "attached_condition": "(`satishecarter_dec_setup_001`.`cscart_bm_blocks_descriptions`.`lang_code` = 'en')"
          }
        },
        {
          "table": {
            "table_name": "cscart_bm_blocks",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "block_id"
            ],
            "key_length": "4",
            "ref": [
              "satishecarter_dec_setup_001.cscart_bm_blocks_descriptions.block_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 6,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "6.70",
              "eval_cost": "1.34",
              "prefix_cost": "23.88",
              "data_read_per_join": "1K"
            },
            "used_columns": [
              "block_id",
              "type",
              "properties",
              "company_id",
              "storefront_id"
            ]
          }
        },
        {
          "table": {
            "table_name": "default_content",
            "access_type": "ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "block_id",
              "snapping_id",
              "lang_code",
              "object_id"
            ],
            "key_length": "18",
            "ref": [
              "satishecarter_dec_setup_001.cscart_bm_blocks_descriptions.block_id",
              "const",
              "satishecarter_dec_setup_001.cscart_bm_blocks_descriptions.lang_code",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 6,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "6.70",
              "eval_cost": "1.34",
              "prefix_cost": "31.92",
              "data_read_per_join": "1K"
            },
            "used_columns": [
              "snapping_id",
              "object_id",
              "object_type",
              "block_id",
              "lang_code",
              "content"
            ],
            "attached_condition": "<if>(is_not_null_compl(default_content), (`satishecarter_dec_setup_001`.`default_content`.`object_type` like ''), true)"
          }
        },
        {
          "table": {
            "table_name": "dynamic_object_content",
            "access_type": "ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "block_id"
            ],
            "key_length": "4",
            "ref": [
              "satishecarter_dec_setup_001.cscart_bm_blocks_descriptions.block_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 6,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "6.70",
              "eval_cost": "1.34",
              "prefix_cost": "39.96",
              "data_read_per_join": "1K"
            },
            "used_columns": [
              "object_id",
              "object_type",
              "block_id",
              "lang_code",
              "content"
            ],
            "attached_condition": "<if>(is_not_null_compl(dynamic_object_content), ((`satishecarter_dec_setup_001`.`dynamic_object_content`.`object_id` = 0) and (`satishecarter_dec_setup_001`.`dynamic_object_content`.`lang_code` = `satishecarter_dec_setup_001`.`cscart_bm_blocks_descriptions`.`lang_code`) and (`satishecarter_dec_setup_001`.`dynamic_object_content`.`object_type` like '')), true)"
          }
        },
        {
          "table": {
            "table_name": "cscart_bm_snapping",
            "access_type": "ALL",
            "possible_keys": [
              "grid_id"
            ],
            "rows_examined_per_scan": 108,
            "rows_produced_per_join": 15,
            "filtered": "2.13",
            "using_join_buffer": "Block Nested Loop",
            "cost_info": {
              "read_cost": "20.70",
              "eval_cost": "3.08",
              "prefix_cost": "91.48",
              "data_read_per_join": "11K"
            },
            "used_columns": [
              "snapping_id",
              "block_id",
              "grid_id",
              "wrapper",
              "user_class",
              "order",
              "status"
            ],
            "attached_condition": "((`satishecarter_dec_setup_001`.`cscart_bm_snapping`.`block_id` = `satishecarter_dec_setup_001`.`cscart_bm_blocks_descriptions`.`block_id`) and (`satishecarter_dec_setup_001`.`cscart_bm_snapping`.`grid_id` in (1,2,3,4,5,6,9,7,8,12,15,20,13,14,16,17,18,19,21,22,88,89,90)))"
          }
        },
        {
          "table": {
            "table_name": "cscart_bm_block_statuses",
            "access_type": "ALL",
            "possible_keys": [
              "snapping_id"
            ],
            "rows_examined_per_scan": 2,
            "rows_produced_per_join": 30,
            "filtered": "100.00",
            "using_join_buffer": "Block Nested Loop",
            "cost_info": {
              "read_cost": "2.25",
              "eval_cost": "6.16",
              "prefix_cost": "99.90",
              "data_read_per_join": "3K"
            },
            "used_columns": [
              "snapping_id",
              "object_ids",
              "object_type"
            ],
            "attached_condition": "<if>(is_not_null_compl(cscart_bm_block_statuses), ((`satishecarter_dec_setup_001`.`cscart_bm_snapping`.`snapping_id` = `satishecarter_dec_setup_001`.`cscart_bm_block_statuses`.`snapping_id`) and (`satishecarter_dec_setup_001`.`cscart_bm_block_statuses`.`object_type` like '')), true)"
          }
        }
      ]
    }
  }
}

Result

grid_id block_id content object_id object_type object_ids snapping_id wrapper user_class order status type properties company_id storefront_id lang_code name
4 5 0 5 top-logo 0 A template a:2:{s:8:"template";s:32:"blocks/static_templates/logo.tpl";s:11:"enable_link";s:1:"Y";} 0 1 en Logo
5 6 0 6 0 A call_request a:1:{s:8:"template";s:44:"addons/call_requests/blocks/call_request.tpl";} 0 1 en Call Request
7 7 0 7 top-search 0 A template a:1:{s:8:"template";s:34:"blocks/static_templates/search.tpl";} 0 1 en Search
88 10 0 95 0 A breadcrumbs a:1:{s:8:"template";s:22:"common/breadcrumbs.tpl";} 0 1 en Breadcrumbs
89 11 0 96 blocks/wrappers/mainbox_general.tpl 0 A main 0 1 en Main Content
16 14 0 14 blocks/wrappers/footer_general.tpl 0 A template a:1:{s:8:"template";s:53:"blocks/static_templates/my_account_links_advanced.tpl";} 0 1 en My account
17 15 a:1:{s:4:"menu";s:1:"3";} 0 15 blocks/wrappers/footer_general.tpl footer-menu-shop 0 A menu a:2:{s:8:"template";s:26:"blocks/menu/text_links.tpl";s:18:"show_items_in_line";s:1:"N";} 0 1 en Shop
18 16 a:1:{s:4:"menu";s:1:"4";} 0 16 blocks/wrappers/footer_general.tpl footer-menu-create-orders 0 A menu a:2:{s:8:"template";s:26:"blocks/menu/text_links.tpl";s:18:"show_items_in_line";s:1:"N";} 0 1 en Create order
19 17 a:1:{s:7:"content";s:394:"<ul> <li>3993 Hanover Street<br/>New York, NY 10016 </li> <li><bdi>+19177227425</bdi> (call is free)</li> <li><bdi>10 am — 6 pm</bdi><br/> Monday - Friday</li> <li><a class="ty-exception__links-a greeny" href="mailto:sales@example.com">sales@example.com</a></li> <li><a href="{"pages.view?page_id=20"|fn_url}" class="ty-exception__links-a">About company</a></li> </ul> ";} 0 17 blocks/wrappers/footer_general.tpl footer-no-wysiwyg footer-contacts 0 A safe_smarty_block a:1:{s:8:"template";s:28:"blocks/safe_smarty_block.tpl";} 0 1 en About us
90 61 0 97 0 A gift_certificates_verify a:1:{s:8:"template";s:60:"addons/gift_certificates/blocks/gift_certificates_verify.tpl";} 0 1 en Gift certificate verification
1 1 a:1:{s:4:"text";s:0:"";} 0 1 top-languages 2 A languages a:3:{s:8:"template";s:20:"blocks/languages.tpl";s:6:"format";s:4:"icon";s:14:"dropdown_limit";s:1:"0";} 0 1 en Languages
3 4 0 4 blocks/wrappers/onclick_dropdown.tpl top-my-account 2 A my_account a:1:{s:8:"template";s:21:"blocks/my_account.tpl";} 0 1 en My Account
8 8 0 8 top-cart-content 2 A cart_content a:5:{s:8:"template";s:23:"blocks/cart_content.tpl";s:22:"display_bottom_buttons";s:1:"Y";s:20:"display_delete_icons";s:1:"Y";s:19:"products_links_type";s:5:"thumb";s:20:"generate_block_title";s:1:"Y";} 0 1 en Cart content
9 9 a:1:{s:4:"menu";s:1:"2";} 0 9 top-menu 2 A menu a:3:{s:8:"template";s:35:"blocks/menu/dropdown_horizontal.tpl";s:30:"dropdown_second_level_elements";s:2:"12";s:29:"dropdown_third_level_elements";s:1:"6";} 0 1 en Main menu
13 12 0 12 2 A template a:1:{s:8:"template";s:65:"addons/newsletters/blocks/static_templates/subscribe_advanced.tpl";} 0 1 en Subscribe
14 13 a:1:{s:7:"content";s:773:"<div class="ty-social-link-block"><h3 class="ty-social-link__title">{__("get_social")}</h3> <div class="ty-social-link facebook"> <a href="http://www.facebook.com/pages/CS-Cart/156687676230"><span class="ty-icon ty-icon-facebook ty-icon-moon-facebook"></span></a> </div> <div class="ty-social-link instagram"> <a href="https://www.instagram.com"><span class="ty-icon ty-icon-instagram ty-icon-moon-instagram"></span></a> </div> <div class="ty-social-link twitter"> <a href="https://twitter.com/cscart"><span class="ty-icon ty-icon-twitter ty-icon-moon-twitter"></span></a> </div> <div class="ty-social-link youtube"> <a href="https://www.youtube.com/user/cscartvideos"><span class="ty-icon ty-icon-youtube ty-icon-moon-youtube"></span></a> </div></div> ";} 0 13 2 A safe_smarty_block a:1:{s:8:"template";s:28:"blocks/safe_smarty_block.tpl";} 0 1 en Social links
21 18 0 18 2 A template a:1:{s:8:"template";s:37:"blocks/static_templates/copyright.tpl";} 0 1 en Copyright
22 19 0 19 2 A template a:1:{s:8:"template";s:41:"blocks/static_templates/payment_icons.tpl";} 0 1 en Payment icons
1 2 a:1:{s:4:"text";s:0:"";} 0 2 top-currencies 3 A currencies a:3:{s:8:"template";s:21:"blocks/currencies.tpl";s:6:"format";s:6:"symbol";s:14:"dropdown_limit";s:1:"3";} 0 1 en Currencies
2 3 a:1:{s:4:"menu";s:1:"1";} 0 3 top-quick-links 3 A menu a:2:{s:8:"template";s:26:"blocks/menu/text_links.tpl";s:18:"show_items_in_line";s:1:"Y";} 0 1 en Quick links