Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42ce97a5587d9051b613b6394b431d5755f3faa8cdac3e3376b039a1470a448f' 
  AND token = 'Se/6yOZ2pDyiF1BNed3smzu54FZkr32oWHCh7BqQJ90=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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