mysql Sending data slow on inner join - mysql

Question

I have tow SAME dedicated servers.
SQL-query on first work fine and quick.
SELECT
`store_item`.`product_id`
FROM
`store_item`
INNER JOIN `store`
ON (
`store_item`.`store_id` = `store`.`id`
)
WHERE (
`store_item`.`product_id` IN (
<many id (up to 500)>
)
AND `store`.`is_active` = 1
AND `store_item`.`is_available` = 1
)
LIMIT 200 ;
On other server with SAME configuration and SAME version mysql:
What could be wrong?
update 1.
Table stucture are same in both servers.
Structure Table store
CREATE TABLE `store` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`type` int(11) NOT NULL,
`name` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`address` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`phone` varchar(100) COLLATE utf8_unicode_ci NOT NULL,
`email` varchar(75) COLLATE utf8_unicode_ci NOT NULL,
`url` varchar(200) COLLATE utf8_unicode_ci NOT NULL,
`description` longtext COLLATE utf8_unicode_ci NOT NULL,
`delivery_days` varchar(50) COLLATE utf8_unicode_ci NOT NULL,
`currency_id` int(11) NOT NULL,
`account_currency_id` int(11) NOT NULL,
`minimal_margin` decimal(5,2) NOT NULL,
`balance_money` decimal(10,2) NOT NULL,
`total_count` int(11) NOT NULL,
`added_count` int(11) NOT NULL,
`empty_count` int(11) NOT NULL,
`unknown_count` int(11) NOT NULL,
`is_distributor` tinyint(1) NOT NULL,
`is_active` tinyint(1) NOT NULL,
`group` int(11) NOT NULL,
`sort` int(11) NOT NULL,
`return_percent` int(11) NOT NULL,
`updated` datetime NOT NULL,
PRIMARY KEY (`id`),
KEY `store_52094d6e` (`name`),
KEY `store_41f657b3` (`currency_id`),
KEY `store_145a375d` (`sort`),
KEY `store_60ef08a5` (`account_currency_id`)
) ENGINE=MyISAM AUTO_INCREMENT=163 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
Structure store_item
CREATE TABLE `store_item` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`store_id` int(11) NOT NULL,
`code` varchar(54) COLLATE utf8_unicode_ci NOT NULL,
`product_id` int(11) NOT NULL,
`manufacturer_id` int(11) NOT NULL,
`num` varchar(50) COLLATE utf8_unicode_ci NOT NULL,
`name` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`description` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`price_in` decimal(10,2) NOT NULL,
`price_out` decimal(10,2) NOT NULL,
`count` int(11) NOT NULL,
`is_available` tinyint(1) NOT NULL,
`delivery_days` varchar(50) COLLATE utf8_unicode_ci NOT NULL,
`discount_id` int(11) DEFAULT NULL,
`discount_code` varchar(20) COLLATE utf8_unicode_ci NOT NULL,
`modified` datetime NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `store_id` (`store_id`,`product_id`),
KEY `store_item_47799232` (`store_id`),
KEY `store_item_44bdf3ee` (`product_id`),
KEY `store_item_516bb1bd` (`count`),
KEY `store_item_4ac7f441` (`manufacturer_id`),
KEY `store_item_3aac1984` (`num`),
KEY `store_item_52094d6e` (`name`),
KEY `store_item_5c536bf3` (`discount_id`),
KEY `store_item_65da3d2c` (`code`),
KEY `store_item_5436e97a` (`modified`),
KEY `store_item_64b158cd` (`discount_code`),
KEY `store_item_5e0d2c81` (`is_available`)
) ENGINE=MyISAM AUTO_INCREMENT=16070923 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci