Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1efc69d6eb54b6c698bd4afb7213b5448ca9c9852aa22287daa4a8742a97be4c' 
  AND token = '1bCjzTkfq1XCBqU7WcDH23Q58ljALZMyubhOYRykGho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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