2 man launch switch 1 second max delay

Hi everyone i am looking at making a launch turn key switch in which both keys need to be turned in unison. To this however i have no idea where to start. My original idea was to have them in a series but there would be no time limit on that.

if anyone has any ideas please let me know. Anything is appreciated.

Is this even Possible??

Wire each switch to a different input pin
Note the time when each become closed (or open, whatever) and take the difference of the times.

thank you so much do have any examples or code snippets that could help. would i need to include the timers library and then do something like..

key turned
note time
second key
distance too long
Nothing

No need for a timer library, just use millis.
Take a look at the state change example code in the IDE.
And don't think of it as "first key, second key"

thank you so much. i assume this uses with all switches? i just know some are like momentary and some are just push. I am looking at using a key ( on off ) switch. Will this still work?

And thank you so much this is extremely helpful

Key switches are not normally momentary.
Even if they were, a 16MHz processor is more than fast enough.