Didn't get a Token for getting a S+ on a mastery 5

Tokens can only be obtained on SR normals or ranked.

----ELIGIBLE GAME MODES --------- Champion Mastery is available in all matchmaking queues up to Mastery Level 5: Summoner's Rift normal (blind/draft), Twisted Treeline, ranked queues, ARAM and all rotating game modes. However, you can only earn Mastery Level 6 & 7 tokens in Summoner's Rift normal and ranked games. https://support.riotgames.com/hc/en-us/articles/204211284-Champion-Mastery-Guide