Born in
Sochi, Koryan started his career at
Lokomotiv Moscow. After progressing through the club's youth system, he was an unused
substitute in a 0–1 away loss against
CSKA Moscow. On 3 February 2015, Koryan signed for Dutch
Eredivisie club
Vitesse, being initially assigned to Jong Vitesse. On 21 May, he renewed his contract for a further year. On 8 June 2016, Koryan was promoted to the main squad and was assigned the 30 shirt. He made his professional debut on 6 August, replacing
Mitchell van Bergen in the 81st minute of a 4–1 away win against
Willem II. On 31 March 2017, it was announced that Koryan would leave Vitesse along with
Wouter Dronkers and Ewout Gouw at the end of their current deals in June 2017. On 12 July 2017, Koryan returned to
Lokomotiv Moscow as a free agent. He left Lokomotiv upon the expiration of his contract on 30 June 2019. On 1 July 2019, he signed with
Khimki. On 4 March 2021, he extended his contract with Khimki. On 13 August 2021, he joined
Orenburg on loan for the 2021–22 season. On 19 August 2022, Koryan was loaned to
Alania Vladikavkaz. ==International career==