我有一个大约有 300 万行的表。当我使用这个查询来选择时：
SELECT order_code, store_debit, total_price
FROM orders
WHERE 4624603 IN (id, pid) AND `status` = -6;
或此查询（使用OR）
SELECT order_code, store_debit, total_price
FROM orders
WHERE (id = 4624603 OR pid = 4624603) AND `status` = -6;
那一个花了>17secs。但是当我将它分成 2 个查询时：
SELECT order_code, store_debit, total_price
FROM orders
WHERE id = 4624603 AND `status` = -6;
和
SELECT order_code, store_debit, total_price
FROM orders
WHERE pid = 4624603 AND `status` = -6;
它立即返回结果。我如何优化第一个查询以使其运行速度与其他 2 个一样快。
谢谢你们！
更新：这些是表的索引
cop_type payment_type, cod_type, cash_transfer, pid, status, created Normal BTREE
all_type payment_type, cash_transfer, pid, status, created Normal BTREE
theodoi user_id, pid, payment_type, cash_transfer, status, report_atm, pay_status, created Normal BTREE
item_lib item_id, status, pay_status, payment_type, created Normal BTREE
search_phone phone Normal BTREE
search_order_code order_code Normal BTREE
search_order_email email Normal BTREE
order_work cod_id, status, district, payment_type, pay_status, cash_transfer, cod_type, free_ship Normal BTREE
select_hot province, status, type, created, payment_type, pay_status, item_id Normal BTREE
coupon_after_buy id, pid, status, free_ship Normal BTREE
search_ofice office, created, status, ship_status Normal BTREE
search_item item_id, office, created, status, ship_status Normal BTREE
idx_ward_id ward_id Normal BTREE
idx_street street_id Normal BTREE
idx_group_code group_code, pid Normal BTREE
idx_paytime payment_time Normal BTREE
search_all pid, status, created Normal BTREE
idx_country_type country_type Normal BTREE
idx_book_time book_time Normal BTREE