Unused index MySql

Unused index MySql
Find --


logic is here


SELECT
    t.TABLE_SCHEMA,
    t.TABLE_NAME,
    s.INDEX_NAME,
    s.COLUMN_NAME,
    s.SEQ_IN_INDEX,
    ( SELECT MAX(SEQ_IN_INDEX)
    FROM INFORMATION_SCHEMA.STATISTICS s2
    WHERE s.TABLE_SCHEMA = s2.TABLE_SCHEMA
    AND s.TABLE_NAME = s2.TABLE_NAME
    AND s.INDEX_NAME = s2.INDEX_NAME
    ) AS `COLS_IN_INDEX`,
    s.CARDINALITY AS `CARD`,
    t.TABLE_ROWS AS `ROWS`,
    ROUND(((s.CARDINALITY / IFNULL(t.TABLE_ROWS, 0.01)) * 100), 2) AS `SEL %`
FROM INFORMATION_SCHEMA.STATISTICS s
    INNER JOIN INFORMATION_SCHEMA.TABLES t
    ON s.TABLE_SCHEMA = t.TABLE_SCHEMA
    AND s.TABLE_NAME = t.TABLE_NAME
WHERE t.TABLE_SCHEMA != 'mysql'
    AND t.TABLE_ROWS > 10
    AND s.CARDINALITY IS NOT NULL
    AND (s.CARDINALITY / IFNULL(t.TABLE_ROWS, 0.01)) < 1.00
ORDER BY `SEL%`, TABLE_SCHEMA, TABLE_NAME;