我应该拥有包含所有where子句字段的索引吗?

我有一张桌子,像这样:

CREATE TABLE films (
    title       varchar(40) NOT NULL,
    did         integer NOT NULL,
    date_prod   date,
    kind        varchar(10)
);

我有一个索引,如下所示:

CREATE INDEX films_title_kind_idx ON films (title, kind);

我有个问题,像这样:

SELECT title, did, kind, date_prod 
FROM films
WHERE title = 'title1' AND
      kind = 'kind2' AND
      did = 4;

我应该创建包含3列的索引吗?或当前索引 电影名称 够了吗?