Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ede801d10a7ba44ac1d92c07a794a1373af5143cd996e0a9cffa2cbdf7320fb' 
  AND token = 'N4xrWypkuK8UXJ+XtX5Wrrby/E62NyHkf/7CoAcOz0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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