The 26-year-old struggled for football in the early stages of the 2017-18 campaign, but an injury to John Stones has opened up a spot in the team.
Mangala has revealed that he is just focusing on the immediate future rather than looking too far ahead.
"I am very realistic. I know everything can happen. I am here today. Whether I will be here in two months, next summer, one year, you never know," Mangala told reporters.
"The only thing you can do is to be focused on what I can control. At the moment I am in the squad, I am at this club. I am going to work, to help my teammates whether I am playing or not."
Mangala helped City record a 1-0 win over Feyenoord in the Champions League on Tuesday night.