I don’t know what faces being “locked” means. Does that mean you’re staring at each other or something?
I like @NaturalMineralWater‘s 90/10 idea. Maybe you could also use body language to let her know what you’re about to do, by touching her in some romantic but non-sexual way when you’re looking at each other. (Upper arm, knee, holding hands, or cup her face in your hand, something like that.) You can also just ask, “can I kiss you?” I’ve done this on dates and it worked out. It’s not like they’re going to say no. :p That smiley reminds me. A lot of people just go all out on their first kiss and slobber all over their partner. It’s a lot nicer if you don’t use tongue at first, and way less pressure. Good luck!