You're either using the wrong key - or the lock is faulty.
Your Honda Civic VTEC Turbo may fail to turn on due to wear on your Turbo.
It sounds like a dead battery
Bad starter or weak battery.
Honda civic Lx 2000 wont start it was idling really low it just turn off on me now it wont start it cranks over like wants to start but nothing
BAD FUEL PUMP
Try moving the steering wheel left and right then attempt to turn the key.
Dead cell in battery or the alternator is defective. That is assuming all words are connected and not corroded.
It could be a number of things, but more than likely its a dead battery. It could also be an alternator.
If your Honda CRV cranks but won't turn over because the spark plugs are not getting spark, ensure the wires are connected. A loose spark plug wire can cause this issue.
It seems that there could be a problem with your starter. It happened to me too.
Starter may have gotten wet and frozen or shorted. Check wiring to starter See if you are getting power to starter
Try putting some oil or spray it with WD40 and see if it works