Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd639f73dab233ea80e830972dd0cf85b3ce83a742df19e208321de59b7901217' 
  AND token = 'obC08NiqRymhw5S33fqa1pwbkAVMclrkgtB7FiZDhgk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00098

JSON explain

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