MySQL: low cardinality/selectivity columns = how to index?

Question

I need to add indexes to my table (columns) and stumbled across this post:

How many database indexes is too many?

Quote: “Having said that, you can clearly

Answer 1

If the data is distributed like 50:50 then query like where status="enabled" will avoid half scanning of the table.

Having index on such tables is completely depends on distribution of data, i,e : if entries having status enabled is 90% and other is 10%. and for query where status="disabled" it scans only 10% of the table.

so having index on such columns depends on distribution of data.