Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30557f169c0fce629d407c24b86fe68f28680de5eeb0cd84334d7d6c7b8898d5' 
  AND token = '2Ogak6BaBdhOMQxoHGbFwUclotrGgBkHg7Xm8IDdOOQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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