Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffe2c469fca762b2f552553581e7dfc045ad86407d0f72b17f87789135b3f147' 
  AND token = 'xk+oGc4LWCryF5CYWXrD7RQt5D8lfX27MFOFhK6nqm4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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