Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb3940011c1c9934b906c893a48bd208b99ea2e13d79db9c4bebc218b79b9695' 
  AND token = 'Da/UgdX/h8jYBsYXg67N9yACHTflBVRXerKgzy8eWnk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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