expiration token not available in Rules?

I'm trying to set up a rule triggered after a user logs in.
I'd like to add a condition where I first check if the user has an expiration date and if the expiration is within the next 30 days.

However I can't seem to find any replacement token for the expiration date.

The expiration date is a proper attribute of the user object but it doesn't seem to show in Rules for data testing.

Any ideas?