I guess even a disposable vape has more computing power than the Lunar lander. (I don't know if that's more or less ridiculous than a key fob, but at least a key is not so disposable.)
Car chargers for usbs, or digital thermometers, or disposable pregnancy tests - it's absurd the amount of compute that ends up even in single use or trivial products.
A lot of that is because those devices have far more than they actually need because the processors/packages are so cheap. Particularly if it's a relatively low volume item it's probably cheaper to just use a slightly overpowered component even if it's a penny or two more vs changing things.
The keyfob was brought up by someone so they can make a clickbaity title: "A thing in your pocket has more computing power than Apollo guidance computer. And it's not your smartphone"