Koné joined Lyon in 2010 after playing for Jeanne D'Arc Bamako in his home country. He spent the 2010–11 season playing on the club's reserve team in the Championnat de France amateur, the fourth level of French football. He appeared in 13 matches scoring one goal as the team won the league's reserves' title. Ahead of the 2011–12 season season, Koné was promoted to the senior team permanently by new manager Rémi Garde and was assigned the number 22 shirt. He made his professional debut on 20 August 2011 in a 1–1 league draw with Brest. In the match, Koné received his first professional red card.
Koné is a former Mali youth international. He played at under-20 level participating in qualification matches for the 2011 African Youth Championship and the tournament itself. Despite helping the team to a fourth place finish at the competition, Koné was not included in the team for the 2011 FIFA U-20 World Cup. On 4 August 2011, he was called up to the senior team for the first time for a friendly match against Tunisia. Koné earned his first cap in the match, which ended in a 4–2 defeat, appearing as a second-half substitute for Sambou Yatabaré.