Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '339887aefa99b86e03ec450c7e94e64c779b9794cdd7e5c79d0097e028a6276c' 
  AND token = 'FqCLsTA87DiwriovgOXdfg1B9g/gTaCeoj+W9fchocc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00393

JSON explain

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