Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0619538c4d03bbd83b8070db66dcdcceb05dd75538f399c11ebaa81c27123857' 
  AND token = 'kV4bJU1XH4Q8mPGbqKAJbdMZiZ7xu/Pg17Rbf4uI6Bg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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