https://preprod.theatre-contemporain.net/contacts/Theatre-de-Chaoue/?path=contacts%2FTheatre-de-Chaoue%2F

id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE c const PRIMARY PRIMARY 4 const 1
1 SIMPLE sc index_merge idnew, idcontact idcontact, idnew 5, 4 1 Using intersect(idcontact, idnew); Using where