Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eaa1407847d81fc1779c83857ba23add9ae81b42e064d90a269dfbf6cb1cc6e6' 
  AND token = 'u9w5hbthcqHQxMQ/VzlZMWTiuPgntNvn8Ty98knLcnU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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