Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38ecfc2be65740e5532bab486218b98201491138de1666ffa902a8804fe66e3f' 
  AND token = '1pnZ6U6r5YTIj/MEGH6z6YA/5eU+kGSQ+7s+H++eqoU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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