Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ab686bc9209733a011add59ea07a66308c9dceff197ce8654bf670fd6a6ab98' 
  AND token = 'qOfK05Qjj9I6e9HWlf3ns6EvF5X/Bn14UHwP8vlNgpI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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