Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd61daff15b4f2b9588a0b814c3a89468dbd3a539464d437498d4495296dd16e8' 
  AND token = 'h/wQlpc+g708qgV4tAr/aOXhw75myI+9M19flwVViCI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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