Array is not updated

I'm working with NodeJS, I create a Arrayand then I make a query to my database. When I get results, I do pushto add elements to the array, however when I want to print the elements there is nothing.

function sendMessageToUser(req, res) {
    var devicesTokenNotification = new Array();
    req.getConnection(function(err,connection){
        var query = connection.query('SELECT usuario_id, PERIOD_DIFF(DATE_FORMAT(created, "%Y%m"), DATE_FORMAT(NOW(), "%Y%m")) as meses FROM documento', [], function(err, rows){
            if(err)
                console.log("Error Selecting : %s ",err );

            if (rows.length > 0) {
                for (var i = 0; i < rows.length; i++) {
                    if (rows[i].meses > 7){
                        var queryUsuarios = connection.query('SELECT deviceToken from usuario where id = ?', [rows[i].usuario_id], function(err, row){
                            if(err)
                                console.log("Error Selecting : %s ",err );

                            devicesTokenNotification.push(row[0].deviceToken);
                        });
                    }
                }
            }
            for (var cont = 0; cont < devicesTokenNotification.length; cont++) {
                console.log(devicesTokenNotification[cont]);
            }
        });
    });
};

However, if I apply the same forbut inside the query queryUsuariosif it prints the values.