Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86a9b8f03404f57dec19b700aab44b7171d0ea067858fc8b4518883cec72eb01' 
  AND token = 'Cs9G5Ox2mI0bqO0PCTWF2fZUEt3yTcXKWAwdbpLY9BM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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