I recently got an S ranking on Olaf in Twisted Tree. But did not get Mastery token. I have level 5 on my mastery only one token. We did not win the game. Do you need to win the game to get mastery token? I thought it used to not be that.
I think you only get tokens in 5v5
Unfortunately, you cannot earn mastery tokens when playing on ARAM, Twisted Treeline, or any of the rotating game modes. You can only earn them when play normal or ranked Summoner's Rift matches.
https://support.riotgames.com/hc/en-us/articles/204211284-Champion-Mastery-Guide#h1q5
