Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bef99643eb54b79eca5d6eea78fba9131ee5199f24f620bfdaccc8855c65d87' 
  AND token = 'HZRfbyLbrKUS9k0WTFRS04eu4xgd+Dh/3LQl1cxIfvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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