Los Blancos hold a slender advantage after they secured a 1-1 draw in the opening leg of their semi-final clash at the Nou Camp on Wednesday night.
Lucas Vazquez put Real in front after just six minutes before Malcom rescued the hosts with his second-half equaliser.
Barcelona are bidding to win the competition for a fifth consecutive time, but goalkeeper Navas hopes Real can stop their run of domination when the two sides meet again on February 27.
‘We knew we had to score and hopefully we can make the away goal count because we want to be in that final,’ he told Real Madrid TV.
‘Both sides created chances and we both enjoyed spells on top.’
Ahead of the return match, Navas added:
‘We expect a tough game. You can’t think it is going to be a walk in the park because both clubs want to be in that final.
‘So, we have to try and do things better than they do to book our place there.’