Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7868de45ec036b44b709b56cd20898a18c2cb540bc00559284b9e37fc31ae387' 
  AND token = 'LzNqmzVUJ8Ve8w6IuV3hhaLHU4qwX1U0MSRQ1Aike4E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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