joining tables takes very long time symfony 2.7 - mysql

Question

I have the following query which takes more than 20 secs (20138ms) to return the results.
$locale = 'en'; // test
$query = $this->getEntityManager()->createQuery('
SELECT
product.id, product.productnr, ProductGrp.productgrp' . $locale . ', Criteria.criteria'.$locale.'
FROM
Productbundle:product product
JOIN
Productbundle:Criteria Criteria WITH Criteria.criteriaid = product.criteriaid
JOIN
Productbundle:ProductGrp ProductGrp WITH ProductGrp.partgrpid = product.partgrpid
WHERE
product.productnr =:productnr
')
->setMaxResults(1)
->setParameter('productnr', $productnr)
->getResult();
when I ran the query from "runnable query" it took about 20 secs (20.7809) in phpmyadmin.
runnable query :
SELECT o0_.id AS id0, o0_.productnr AS productnr1, o1_.productgrpen AS productgrpen2, o2_.criteriaen AS criteriaen3
FROM product o0_
INNER JOIN Criteria o2_ ON (o2_.criteriaid = o0_.criteriaid)
INNER JOIN ProductGrp o1_ ON (o1_.partgrpid = o0_.partgrpid)
WHERE o0_.productnr = 'ABC1234'
LIMIT 1;
However when I ran the following code in phpmyadmin it takes less than 2seconds to return the results
SELECT product.id, product.productnr,ProductGrp.productgrpen ,Criteria.criteriaen
FROM `product`
INNER JOIN ProductGrp ON ProductGrp.partgrpid = product.partgrpid
INNER JOIN Criteria ON Criteria.criteriaid = product.criteriaid
Where productnr = 'ABC1234'
LIMIT 1
table size
-------------------------------
|Product | over 5mill rows |
-------------------------------
|ProductGrp | over 200 rows |
-------------------------------
|Criteria | over 600 rows |
-------------------------------
Symfony version : 2.7

Answer 1

Indexes although not listed, I would suggest the following
table indexed on
Product (productnr, id, criteriaid, partgrpid )
Criteria (criteriaid ) -- would expect as primary key
ProductGrp (partgrpid ) -- also would expect
Also, how many "locale" string version columns do you have / support.