Bluebird type error: expecting an array, promise or thenable

I don't know if I'm not using the .spread method correctly while working with Bluebird promises on Sails.js models. Here's what I have:

transactionAsync('BEGIN')
.then(function() {
    return Model.findOne({ id: 5) });
})
.then(function(results){
    if(!results) {
        return res.notFound();
    }
    crypto.randomBytes(24, function(err, buf) {
        if(err) throw new Error(err);
        var token =  buf.toString('hex');
        // This is where it fails
        return [results, token];
    });
})
.spread(function(results, token) {
    // It doesn't get to log these
    console.log(results, token);
    ...
});

After returning [results, token] on the second .then (inside of the crypto callback), it spits out

[TypeError: expecting an array, a promise or a thenable]

I removed the rest of the code after .spread, since it's not really relevant, and that's where execution stops before returning an error.

I just want to pass variables results and token to the function inside of .spread. What am I doing wrong?

Any help is great. Thanks.