Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '230d2717eebf8e20d9cbfb88e929ea833748879f377c98fdc8ed46d2f3b6530e' 
  AND token = '/WEbtZu9QbMramxX5MyYA6bYDVdwD0XFwRPOFLKJ4fQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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