Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d8e361d2070f61c2c25d93a73524cf07c2f6dd421f3da7cd3c44b8926ffe361' 
  AND token = 'yWcld1EE7cRGhfY+8OQoY6oydbmI+7c9bH3GJGUXadc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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