to.rb

require 'rubygems'
require 'timeout'
require 'mysql'

Timeout::timeout(5) {
  conn = Mysql.new('localhost', 'hobodave', 'hobopass', 'test')
  conn.query("SELECT SLEEP(300)")
}

to2.rb

require 'rubygems'
require 'timeout'
require 'active_record'

=begin
CREATE TABLE products (
   id int(11) NOT NULL auto_increment,
   name varchar(255),
   PRIMARY KEY  (id)
 );
=end

class Product < ActiveRecord::Base; end

Timeout::timeout(5) {
   ActiveRecord::Base.establish_connection(
     :adapter  => "mysql",
     :host     => "localhost",
     :username => "hobodave",
     :password => "hobopass",
     :database => "test"
   )
  Product.find_by_sql 'select sleep(300)'
}