Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67e3ac8705b5195ad4f62bf301c3bcbece8c7a768621cc9c6f78459f4e7ebc98' 
  AND token = 'Kw2i+WAXxdbpT6TU86pxa/L7uiccXQDcEE9qXXR76Es=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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