Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02c15685a8d0baa8568c1ba38fa366e7475b0c205c04003700a870a41257963d' 
  AND token = 'okQ2qNsOStCcXaGV6BqN88HVhliFObQu3XFzbTAd2sk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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