Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbea90d0e9b0f6a35d1db1611502fb56a40b96223e9e8fa65f8243224338d0bd' 
  AND token = 'TjQmWrErcOO6C9XOohJOmd7CCgaleY0+WAqcvQxSKOc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}