SELECT 
  cscart_banners.banner_id, 
  cscart_banners.type, 
  cscart_banners.target, 
  cscart_banners.status, 
  cscart_banners.timestamp, 
  cscart_banner_descriptions.banner, 
  cscart_banner_descriptions.description, 
  cscart_banner_descriptions.url, 
  cscart_banner_images.banner_image_id, 
  cscart_banners.company_id 
FROM 
  cscart_banners 
  LEFT JOIN cscart_banner_descriptions ON cscart_banner_descriptions.banner_id = cscart_banners.banner_id 
  AND cscart_banner_descriptions.lang_code = 'en' 
  LEFT JOIN cscart_banner_images ON cscart_banner_images.banner_id = cscart_banners.banner_id 
  AND cscart_banner_images.lang_code = 'en' 
  INNER JOIN cscart_ult_objects_sharing ON (
    cscart_ult_objects_sharing.share_object_id = cscart_banners.banner_id 
    AND cscart_ult_objects_sharing.share_company_id = 1 
    AND cscart_ult_objects_sharing.share_object_type = 'banners'
  ) 
WHERE 
  1 
  AND (
    cscart_banners.type != 'G' 
    OR cscart_banner_images.banner_image_id IS NOT NULL
  ) 
  AND cscart_banners.status = 'A' 
ORDER BY 
  cscart_banners.timestamp desc 
LIMIT 
  0, 4

Query time 0.00398

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "27.93"
    },
    "ordering_operation": {
      "using_temporary_table": true,
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "0.95"
      },
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_ult_objects_sharing",
            "access_type": "index",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "share_object_id",
              "share_company_id",
              "share_object_type"
            ],
            "key_length": "159",
            "rows_examined_per_scan": 104,
            "rows_produced_per_join": 1,
            "filtered": "1.00",
            "using_index": true,
            "cost_info": {
              "read_cost": "23.26",
              "eval_cost": "0.21",
              "prefix_cost": "23.47",
              "data_read_per_join": "166"
            },
            "used_columns": [
              "share_company_id",
              "share_object_id",
              "share_object_type"
            ],
            "attached_condition": "((`satishecarter_march_003`.`cscart_ult_objects_sharing`.`share_company_id` = 1) and (`satishecarter_march_003`.`cscart_ult_objects_sharing`.`share_object_type` = 'banners'))"
          }
        },
        {
          "table": {
            "table_name": "cscart_banners",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY",
              "status"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "banner_id"
            ],
            "key_length": "3",
            "ref": [
              "satishecarter_march_003.cscart_ult_objects_sharing.share_object_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 0,
            "filtered": "90.91",
            "index_condition": "(`satishecarter_march_003`.`cscart_ult_objects_sharing`.`share_object_id` = `satishecarter_march_003`.`cscart_banners`.`banner_id`)",
            "cost_info": {
              "read_cost": "1.04",
              "eval_cost": "0.19",
              "prefix_cost": "24.71",
              "data_read_per_join": "748"
            },
            "used_columns": [
              "banner_id",
              "status",
              "type",
              "target",
              "timestamp",
              "company_id"
            ],
            "attached_condition": "(`satishecarter_march_003`.`cscart_banners`.`status` = 'A')"
          }
        },
        {
          "table": {
            "table_name": "cscart_banner_descriptions",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "banner_id",
              "lang_code"
            ],
            "key_length": "9",
            "ref": [
              "satishecarter_march_003.cscart_banners.banner_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 0,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.95",
              "eval_cost": "0.19",
              "prefix_cost": "25.85",
              "data_read_per_join": "1K"
            },
            "used_columns": [
              "banner_id",
              "banner",
              "url",
              "description",
              "lang_code"
            ]
          }
        },
        {
          "table": {
            "table_name": "cscart_banner_images",
            "access_type": "eq_ref",
            "possible_keys": [
              "banner"
            ],
            "key": "banner",
            "used_key_parts": [
              "banner_id",
              "lang_code"
            ],
            "key_length": "9",
            "ref": [
              "satishecarter_march_003.cscart_banners.banner_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 0,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.95",
              "eval_cost": "0.19",
              "prefix_cost": "26.98",
              "data_read_per_join": "15"
            },
            "used_columns": [
              "banner_image_id",
              "banner_id",
              "lang_code"
            ],
            "attached_condition": "<if>(found_match(cscart_banner_images), ((`satishecarter_march_003`.`cscart_banners`.`type` <> 'G') or (`satishecarter_march_003`.`cscart_banner_images`.`banner_image_id` is not null)), true)"
          }
        }
      ]
    }
  }
}