Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c88621f322d7a5da6bd09621866fd1f2de4751eae72f689d433cc843b19ec4d' 
  AND token = '/dRqfvkRw8DEm1hvq+tfIM6xbmafrKv8ABMz/ZWEHjc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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