Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f28b57ef3653eb1bda6623a9452617eb7a3e0156310ba9d59e76e8488ee4627' 
  AND token = 'PjUC1XqDzGZgcz6GXGrNqEDmJDz7fOnsSu7CqdhtRSM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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