Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36fa7cda863d404b8ea2ac9cf05b4aaaf44d1e297710ccddc4edef14bfb4c1c1' 
  AND token = '5+6a4Z7ltN3psO2jxL7T72xLBSEzdFjHtnKHqXkT2aY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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