Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '883d2d6966c7aa27734300b2693bb0c82a6e605309a089d31be3cf3f6f4428ee' 
  AND token = 'KyPNzNnbG9gT6PL3v8rDnwaDy8sMyJwRGFq4veaxUKQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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