Premium subscriptions and tokens are two totally different things.
The premium subscription allows you to enjoy unlimited benefits. You pay for a certain period of time (1 month, 2 months, 3 months ...) and enjoy all benefits you're paying for.
Tokens are an internal currency of the site. They allow you to make a fee-for-service payment. You have a token balance that goes down each time you purchase virtual gifts or each time you chat with an Angel.