Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b019e5db05821bc182ccdf917e3c293dd729472c404dc814bddcdddfc59e65f' 
  AND token = '4cgFmsBhSzwsTvBuO/QZY1V7YnBEcVgEQBEajDvVEFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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