MelvinGr/CandySimplyFi-tool existed. This is a simple C++ program that already knew some known strings, and was able to brute-force the key in a matter of seconds. I was able to compile this on my laptop, and run it, and sure enough, it was able to decrypt the data in a matter of seconds. For now, I plugged this key into CyberChef, and was able to decrypt the data.
A common symptom of human mitochondrial dysfunction is a massive feeling of tiredness.
This also strongly suggests that sleep and hunger are both tied to mitochondrial function and energy balance (the latter was already pretty clear!), and that aerobic organisms are constantly adjusting for both fueling their mitochondria and giving them (especially the ones in the central nervous system) some down time for repair and recovery.
If you need oxygen, then you need sleep!