use raw query with sequelize

gistfile1.js

var Sequelize = require('Sequelize');
var sequelize = new Sequelize('dbname', 'username', 'password');
sequelize.connectorManager.client.query('select * from tablename', function(err, results) {
  if (!err) {
    console.log(results);
    // you'll get an array of objects
    // [{id: 1, ...}, {id: 2, ...}]
  } else {
    console.log(err);
  }
})