mysql：是aes_decryption故障？

Question

SELECT AES_ENCRYPT(  "password",  "abcd" ) aesPassword,
"74b59ffd519b89732cc32bee903ae425" = AES_ENCRYPT("password", "abcd") AS result

AES_ENCRYPT("password","abcd")的结果与由其生成的字符串不匹配。

我的MySQL版本是：5.5.44在Ubuntu 14.04上使用