Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8e9602cbad34753900458b7753224014591f3685b51dbfd101aea8b2f7b77e6' 
  AND token = 'pb5TaMp42TQesO7+F4DZt8Wj5pKCY4bLjymFyO4tTYM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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