Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd7470359ead45ae4bdfd439eb340b79d4ddf99dbf05c57095bbf05433fd4dda' 
  AND token = '7ZXgedyr00GawwaFWPhiUdOurWUQCufjz9GH7ycBP3E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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