Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0131715cc346eda866eab53fde749ad5cf994532575cc8b921ac2470f0009751' 
  AND token = 'HgDrUkJ5FCCiIAbHqartlO0PZxVPCM8hOJHQmPUC4+o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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