Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdd201bd7d553a6dda094d91fd938dac4dc6fc71b370633049755c5fa9387cfd' 
  AND token = 'H6mOREKlWqEpNJznCXJ7QeZ9F7zPd5Egz0CSu8wAR04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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