You are looking for the keywords
forward-word. So if you are on a shell where the keybindings aren't working try
bindkey -L | grep backward-word in order to check if they are even configured. There's more information about this in zshzle(1).
You can manually set the keybinding by typing something like this:
bindkey 'Ctrl+v Alt+Right' forward-word
bindkey 'Ctrl+v Alt+Left' backward-word
I've had some troubles with keybindings too and the problem was almost always that the Option/Alt key sent something different than the expected Meta/Escape.