Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdd8d23379688418f2b4c6f34137a9f7177c13841f1b220729c827914dcc9cdb' 
  AND token = 'tiHJKAl5Ug5NR9B5UEHsAXnsd06nhot6rbHwODGaY2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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