Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c5e6c41f6b69009f573df69cb9dcfd2d93f35fab1d4b48a9e5cce5e625b8d66' 
  AND token = 'sfD78sCA1xScmAYXyCAjP7SdxG0GG16QXJtW9cRBbdc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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