Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7df3186adc2d587139933cabbd9f9ae2f19ef2fc8ae490d869d23610253e583a' 
  AND token = 'ccEdHQOv3nwqU+BYyEGPO1mux+BBgXCp5T4Oc+laurQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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