sqlite> CREATE TABLE foo(bar);
sqlite> CREATE INDEX foo_idx ON foo(bar);
sqlite> EXPLAIN QUERY PLAN SELECT * FROM foo WHERE bar = ?;
QUERY PLAN
SEARCH TABLE foo USING COVERING INDEX foo_idx (bar=?)
-- ignore index using NOT INDEXED
sqlite> EXPLAIN QUERY PLAN SELECT * FROM foo NOT INDEXED WHERE bar = ?;
QUERY PLAN
SCAN TABLE foo