mysqli prepared statement with ADDTIME CURTIME fails - php

Question

There are so many questions on SO for failed prepared statements, but I cannot find one which solves my exact problem (or explains it, atleast).
I'm trying to give my users a login-token which is valid for 5 minutes.
When I execute the query through PHPMyAdmin it works just fine:
WORKING QUERY
INSERT INTO LOGGEDIN (userID, loggedInToken, loggedInRefresh) VALUES
(1, "HJKFSJKFDSKLJFLS", ADDTIME(CURTIME(), '00:05:00'));
However, when trying to execute the query through PHP using a prepared statement it fails.
$stmt = $this->conn->prepare("INSERT INTO LOGGEDIN VALUES (userID, loggedInToken, loggedInRefresh) VALUES (?, ?, ADDTIME(CURTIME(), '00:05:00'))");
$stmt->bind_param("is", $userID, $token);
I get the error:
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'VALUES (?, ?, ADDTIME(CURTIME(), '00:05:00'))' at line 1
It is the exact same query so I think it's due to how the prepare handles the query.
I've also tried entering the '00:05:00' as a variable because I thought the ' was causing the error but it fails as well.
$five_minutes = '00:05:00';
$stmt->bind_param("iss", $userID, $token, $five_minutes);
When I remove the prepare and use the following query:
$query = "INSERT INTO LOGGEDIN VALUES (userID, loggedInToken, loggedInRefresh) VALUES (" . $userID . ", '" . $token . "', ADDTIME(CURTIME(), '00:05:00'))";
if ($result = $mysqli->query($query)) {
...
It works fine but I would like to keep my code consistent and use a prepared statement everywhere I can.
How can I let this query execute properly using a prepared statement? If all else fails I think I could create the timestamp in PHP and pass it through to the database thus bypassing the whole ADDTIME calculation, but I would like to know what is causing the problem in the first place.
Problems need to be understood, not dodged.

Answer 1

You have a superfluous VALUES on your query:
$stmt = $this->conn->prepare("INSERT INTO LOGGEDIN VALUES (userID, loggedInToken, loggedInRefresh) VALUES (?, ?, ADDTIME(CURTIME(), '00:05:00'))");
^^
Remove that:
$stmt = $this->conn->prepare("INSERT INTO LOGGEDIN (userID, loggedInToken, loggedInRefresh) VALUES (?, ?, ADDTIME(CURTIME(), '00:05:00'))");