Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e0194c0bcb3636b0cf953946b7e0d68f6e4672a5f89128bf70c19b2e1af239f' 
  AND token = 'RSS7Jc+69miNy5WsgtrtjECX1SRUvo9A8qCEKhMjxic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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