Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6441ca0c7ff96bfb919044e94eed353b4fdcd35019c9b0803890271643725487' 
  AND token = 'DLeGVBDw4HXB9aYBUmhjl1jy2zhywf6x9OCBGCpc1Q8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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