Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '268dd66c9969230168c84ace5e0d4e1f2db09732c8c60f76d6f6310249b6ae41' 
  AND token = 'Q0pOe46bNHrwRCmnmq0x85/At7qqjr1j198Z+jWRmNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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