Any easier way to write this?

The Wiki says I can record key presses in a table to determine whether the key is being held or not, so something like

local keys = {}

    mouse.KeyDown:connect(function(key)
        keys[key] = true
    end)
    mouse.KeyUp:connect(function(key)
        keys[key] = nil
    end)

    while wait(0.1) do
        if keys["q"] and Tool.Val.Value > 0 then
            Tool.Val.Value = Tool.Val.Value - 5
        elseif keys["e"] and Tool.Val.Value < 200 then
            Tool.Val.Value = Tool.Val.Value + 5
        end 
    end

However, I'd also like to differentiate between a key press and someone holding down the key, and while the script is effective enough at doing that, it only checks for key presses every 1/10th of a second, so anytime someone pushes a key in that 10th of a second it won't count. It's minor, yeah, but I'd really like to find a more concise method of determining keystrokes from key presses.