Highlight all keys that look like '&name=' in a text with grep console

Question

I am using grep console plugin in my development environment and I want to highlight parts of my console that look like '&name='. I tried with following regex: [&].*[=]

I want lines like this:

lorem&variable=something{ipsum}&paramter="555"

to look like this

lorem&variable=something{ipsum}&paramter="555"

What would be the grep command to do that