Based on the mileage, there is a good chance the tumbler is just worn the key itself. If you have a spare key, see if that makes a difference. Also, here is a link you may find helpful. Take a look through it to see if anything helps.
If nothing suggested helps, chances are the ignition lock cylinder will need replaced.
Let me know what you find.
Tuesday, January 28th, 2020 AT 5:35 PM