optimization inner join

[nego78]

hello

I've query which use 2 inner joins
i've thought that i use proper indexes but EXPLAIN showed that i'm wrong

my tables:

CREATE TABLE `telefony_Cechy` (
  `Cechy_Id` int(10) unsigned NOT NULL auto_increment,
  `Cechy_Nazwa` varchar(255) collate utf8_polish_ci NOT NULL default '',
  `Cechy_Kolejnosc` int(10) unsigned NOT NULL default '0',
  PRIMARY KEY  (`Cechy_Id`),
  UNIQUE KEY `IX_Nazwa` USING BTREE (`Cechy_Nazwa`),
  KEY `IX_Kolejnosc` (`Cechy_Kolejnosc`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 COLLATE=utf8_polish_ci;

-- --------------------------------------------------------

CREATE TABLE `telefony_CechyDoProduktow` (
  `Produkty_Id` int(10) unsigned NOT NULL default '0',
  `Cechy_Id` int(10) unsigned NOT NULL default '0',
  `CechyWartosci_Id` int(10) unsigned NOT NULL default '0',
  PRIMARY KEY  (`Produkty_Id`,`Cechy_Id`,`CechyWartosci_Id`),
  KEY `IX_Cechy` USING BTREE (`Cechy_Id`),
  KEY `IX_CechyWartosci` USING BTREE (`CechyWartosci_Id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_polish_ci;

-- --------------------------------------------------------

CREATE TABLE `telefony_CechyWartosci` (
  `CechyWartosci_Id` int(10) unsigned NOT NULL auto_increment,
  `CechyWartosci_Nazwa` varchar(255) collate utf8_polish_ci NOT NULL default '',
  PRIMARY KEY  (`CechyWartosci_Id`),
  UNIQUE KEY `IX_Nazwa` USING BTREE (`CechyWartosci_Nazwa`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 COLLATE=utf8_polish_ci;

my query

SELECT b.Cechy_Nazwa,c.CechyWartosci_Nazwa FROM telefony_CechyDoProduktow AS a INNER JOIN telefony_Cechy AS b ON a.Cechy_Id=b.Cechy_Id INNER JOIN telefony_CechyWartosci AS c ON a.CechyWartosci_Id=c.CechyWartosci_Id WHERE a.Produkty_Id = 480 ORDER BY b.Cechy_Kolejnosc;

when i change inner joins into left joins table b is using index
also order by is not optimized but i can throw it away

if you have any suggestion how to repair this query (or tables) i'll be grateful