VSCode has the same command system as atom. These commands can be started through the “command palette” and also bound to a key-combo.
The corresponding command is toggleVim. You can bind this command to a key using the gear-icon > keyboard combos (sry, i don’t know how to switch the language for an exact description 🙂 ) > enter “toggleVim” to the searchbar. Then you can assign a combo to it.
Effectively the extension will be disabled or enabled quickly.