Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f13a8b79fc3ca43006a4a3dd4f1c94cba0bbbd15af50cba2b870a35b60ad830' 
  AND token = 'APqmiiSKCd13p7WJNuOHYauS+NhMTpXVvyXlQ8KTn8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}