Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6baecfb137e5fcfe8d3f474e0f1eaddb7154146ddcf4a930b2333d967750f7e' 
  AND token = '3YtmT6Vwj/bXsInJNju9Lu4D/ihDxY97cy4Im7D7bak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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