to [have] it on lock

https://tts.langeek.co/read?text=dG8gaGF2ZSBpdCBvbiBsb2Nr&hash=1281d3937acfc47e195396be61731e817401fe11&lang=en&cache-only=0&driver=googletts

Here you will find slang for motivation and engagement, reflecting ways people express drive, enthusiasm, and active participation in tasks or goals.