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If a track is greyed out, it means that it’s currently unavailable in your country. Availability of music on Spotify can vary over time and between countries, depending on agreements between Spotify and rights holders, such as artists or record labels.
You can also use this tool to check album availability on Spotify across different countries, by dragging the album artwork from Spotify to somewhere on the webpage, or by copying and pasting the album URI into its search field. When I tried dragging the artwork from the Benny Blisto album by Go Back To The Zoo into this tool in my web browser, it showed that the album (which contains "Electric") is currently unavailable in the United States.
Spotify adds new content every day, so if you can’t find something you’re looking for right now, it may appear (or reappear) soon. In the meantime, you can import a local file to your Spotify library if you have this song as a file on your computer.
Let me know if you have any other questions, and have a good day!
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