It depends on parking opening time. You may be early enough not to need the tram, just walk (which is about 5 minutes). Allow extra time. We were late to Cindi's as the monorails were in a holding pattern for almost 10 minutes. I would allow 30 minutes from the parking lot as there is no guarantee the monorail/boat is standing and waiting for you.
Before reading the other answers I thought it out and figured 40 minutes, so I guess I am close to the other estimates. That is considering you may have to wait for a tram or a monorail and/or ferry boat.