Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da11f07cf055ce05ee5a1309a58a1b98adfa35df903513d05abec46ea753f233' 
  AND token = 'ySShOU+Sjwn+41zswlK4iStXpN+UhLcfWjeG+uBHfCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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