SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '972d8678c44fb4ff581b61b505d206fcbd713e7477d5d487fde8a30e04b1394a' 
  AND token = 'GQIkYJuLOeJ4kuq6LVRuOGNhJgL4Ui3zJztDuBhok2Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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