Google launch their real time search engine today. It works similar to other real time search engines that are already available on the web today. However, this one would work because it is included in the primary Google search!
It seems to be working through a hack right now. Go to Google Trends and click on one of the popular trends. You land on a Google search for that keyword. You can now try your keyword to see real time search results for that work.

It might not work as expected for you. But this search engine would become available to all pretty soon.