Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b38dcd51b4cae1eec5edceb3da293e6c054a7377fb075a828d6081b872a0685' 
  AND token = '/D+sep1kpAIuODMnJt63GvoeBVrlH+OahuxE7jDZpeA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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