There are a couple of ways you can check to see if your hub is indexed.
One is to search Google for a sentence or short snippet of text from your hub. Make sure to put the sentence in quotes("")
Another way would be to use the "cache:url" command in google.
The "cache:" command shows the google cache of the url.
So if you wanted to see if hubpages.com was indexed, you could search google for "cache:hubpages.com" . Except, don't use the quotes when you do it this way.