Node.js - mysql query timeout

How do I set a timeout for a mysql query in node.js?

/*...*/ 

var mysql = require("mysql");

/* ...*/ 

app.get("/", function(req, res) { 
     connection.query("SELECT ...", function(err, rows, fields) {
 /* I want this query to fail if the ^_ callback is not invoked within x seconds */

     });
}