MySQL联接和数据透视表

Question

tbl_orders

order_id, qty
123, 2
124, 1
125, 3
126, 1
127, 1
128, 1
129, 4

tbl_score

order_id, name, created
123, product 1, 2018-06-01
124, product 1, 2018-06-01
125, product 1, 2018-06-02
126, product 3, 2018-06-02
127, product 2, 2018-06-03
128, product 3, 2018-06-03
129, product 3, 2018-06-03

必填输出

             2018-06-01       2018-06-02        2018-06-03
product 1        3                  3               0
product 2        0                  0               1
product 3        0                  1               5

以下查询将生成2018-06-01所需的输出，但是大约需要1分45秒才能在实时数据库上完成。如果我使用case添加更多日期，则会花费更多时间。有人可以帮助我进行微调还是建议其他解决方案？

select s.name, 
  sum( case when date(s.created) = '2018-06-01' then o.qty else 0 end ) as 'June 1'  
from tbl_score s  inner join tbl_order o 
 on s.order_id=o.order_id group by s.name;