Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '600573e4d7ccdc9acf4076e9139920a046cd36e449348fe03fc64f8a299fd45e' 
  AND token = 'ol4BUdR5zExO3WLz+0a8Gof4aFn3UiGleYimx3dWQCQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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