The German keeper has jumped above Mignolet in the pecking order and will keep his place for Monday night's Premier League trip to lowly Swansea City.
“Now you are back in goal you have to prove yourself and show how good you are to stay No 1 in the long-term, not just for the moment, to prove maybe I'm the long term No 1 that can be in goal here for Liverpool for years to come," Karius told Liverpoolfc.com.
"But that's far ahead. Right now I just want to help the team in the remaining four months of the season to reach our goals and do well.
“I've been using the Champions League to get game time and prove myself. That was very good for me. There were not that many games but it's the highest level you can play on.
“I had a few league games now and then but of course now it's going to be different playing every week. It's nice, it's great to hear."