Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad01a98cb25dbd87727475f7bc7fd4250995fe39bfcd574e76514f83e8fb91fd' 
  AND token = 'YeGMAM+MdMB43r2gREbMg4L5zhWevHfd/eXz4/bkfj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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