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SELECT 
  cscart_payments.payment_id, 
  cscart_payment_descriptions.payment 
FROM 
  cscart_payments 
  INNER JOIN cscart_images_links ON cscart_payments.payment_id = cscart_images_links.object_id 
  AND cscart_images_links.object_type = 'payment' 
  LEFT JOIN cscart_payment_descriptions ON cscart_payments.payment_id = cscart_payment_descriptions.payment_id 
  AND cscart_payment_descriptions.lang_code = 'fr' 
  INNER JOIN cscart_ult_objects_sharing ON (
    cscart_ult_objects_sharing.share_object_id = cscart_payments.payment_id 
    AND cscart_ult_objects_sharing.share_company_id = 3 
    AND cscart_ult_objects_sharing.share_object_type = 'payments'
  ) 
WHERE 
  cscart_payments.status = 'A' 
ORDER BY 
  cscart_payments.position, 
  cscart_payment_descriptions.payment

Query time 0.09578

Explain
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	cscart_payments	ALL	PRIMARY				8	Using where; Using temporary; Using filesort
1	SIMPLE	cscart_payment_descriptions	eq_ref	PRIMARY	PRIMARY	9	mahm3t_cs443.cscart_payments.payment_id,const	1	Using where
1	SIMPLE	cscart_ult_objects_sharing	eq_ref	PRIMARY	PRIMARY	159	mahm3t_cs443.cscart_payments.payment_id,const,const	1	Using where; Using index
1	SIMPLE	cscart_images_links	ref	object_id	object_id	78	mahm3t_cs443.cscart_payments.payment_id,const	1	Using where; Using index

Result

payment_id	payment
12	Virement SEPA
3	PayPal / Carte de débit ou de crédit