Loken started his career with the youth set-up at Royal Wahingdoh[1] before joining Shillong First Division side Shillong United for the 2014 season on loan.[2]
He made his professional debut for Royal Wahingdoh in the I-League on 27 January 2015 against Bharat FC, coming on as a 93rd-minute substitute for Bekay Bewar as Royal Wahingdoh won 2–1.[3]