Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '664f737a9347110b02e7b5fd6a5f72f96f75f12a9242379849d21e34ae05f5c2' 
  AND token = 'YnYf3ew3maNgEBjZv20+9ZqX0ELFB0GEKb2IXE9MSRE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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