Stuck thrust levers are never a good scenario.
I have had only one, in a TriStar, and it stuck fast during descent.
Landed without incident, after having shut down the affected engine, and the maintenance rep lubed the pepper box.
Yes, it worked then, but later on it stuck fast again in the cruise (with another crew) and they had to land and get if fixed properly...which took three days.
The 250 pax were not happy campers, as was the respective airline's maintenance director.
Fix it right...the first time.