How should I go along making this door key script? What if theres more than one key to check?

So basically I want the door to open if the player has the correct key, but now I'm rethinking what if the player has more than one key in the backpack. How should I have it check each key?

The Script:

local Open = script.Parent.Open.Value

function OpenDoor()
		script.Parent.Frame.Transparency = 1
		script.Parent.Frame.CanCollide = false
		script.Parent.Knob.Transparency = 1
		script.Parent.Knob.CanCollide = false
		script.Parent.Frame2.Transparency = 0
		script.Parent.Frame2.CanCollide = true
		script.Parent.Knob2.Transparency = 0
		script.Parent.Knob2.CanCollide = true
		script.Parent.OpenFX:Play()
		Open = true
end

function CloseDoor()
	script.Parent.Frame.Transparency = 0
	script.Parent.Frame.CanCollide = true
	script.Parent.Knob.Transparency = 0
	script.Parent.Knob.CanCollide = true
	script.Parent.Frame2.Transparency = 1
	script.Parent.Frame2.CanCollide = false
	script.Parent.Knob2.Transparency = 1
	script.Parent.Knob2.CanCollide = false
	script.Parent.CloseFX:Play()
	Open = false
end

function ClickOpen(Player)
    if Open == false and Player.Backpack.Key then
        if script.Parent.Broken.Value == false and Player.Backpack.Key.Grooves.Value == "E2SGF3G5" then
            OpenDoor()
        end
    end
end

function ClickClose()
	if Open == true then
		if script.Parent.Broken.Value == false then
			CloseDoor()
		end
	end
end

function Knock()
	if Open == false then
		script.Parent.KnockFX:Play()
	end
end

script.Parent.Knob.ClickDetector.MouseClick:Connect(ClickOpen)

script.Parent.Knob2.ClickDetector.MouseClick:Connect(ClickClose)

script.Parent.Frame.ClickDetector.MouseClick:Connect(Knock)

Layout

https://imgur.com/a/IR7Bkuy

Assuming that the keys are Tools with handles and not a different type of object and that different keys have different names. You can have the door simply check if the key that collides with it has the correct name when they touch.

local Door = workspace.Door.Frame
local Open = script.Parent.Open.Value

function OpenDoor()
	for i, v in pairs(script.Parent:GetChildren()) do
		if v:IsA("BasePart") then
			v.Transparency = 1
			v.CanCollide = false
		end
	end
	script.Parent.OpenFX:Play()
end


Door.Touched:connect(function(Key)
	if Key.Parent.Name == "Correct Key" then
	OpenDoor()
end)

Here "Correct Key" is simply a placeholder for whatever name you would be using for the key that opens this door. Also instead of changing the transparency and collision of each part of the door one by one, you can use a for loop like the one shown to do the same process for all the bricks of the door.