This is more of a glaze than an icing when warmed, but you can also spread it on the scones when it is in a creamy state at room temperature. For a shinier glaze, warm the mixture for just a moment so that the coconut oil melts a bit.
Cream the honey and coconut oil together in a small bowl with a spoon. Add the lemon juice and blend well. If your glaze has little white lumps in it (like mine did), you can warm it for a moment and then strain the melted glaze to separate the white lumps. You'll need to cool it to room temperature to get it back to the creamy state.