Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '81efa464be7e4cef2ef82d35dfea97f742fe053ff01d8702cf1055ae86833ff7' 
  AND token = 'mCd5zXwyodDl8PLNA95refEgDH8AVeLpl7bkfhxHqv4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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