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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '477d9371330e6d11df5e3ccc27807a9cc30f7d513e476ca8ccd702458245485b' 
  AND token = 'NG/10wQuhRaPGpdttNJ72Cpzram1dQWbO1EWbkzJZMY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00150

JSON explain

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