Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5ee85866ce1c3019a6f00ed08532bb4bc11428a21925b19d499282bb8ee4755' 
  AND token = 'xpv5JrUr3DCPvcvqTVdPStKbiIXl78JZVUHJPry337Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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