SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3aa549fd9b82896711361cc4b76448ffd75cb3898b08c256e93ca0ff0427e710' 
  AND token = 'cFw4iEvwrHMqPpop8Luw2YTglCfFERU6SwtRhUq3zug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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