Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fda39acec4cefbeb50918631b67cfdaf179127d2366d84004d89a43a2683f6cc' 
  AND token = 'A6pZuCj8hvgd1ImKug99gAiv1dT4edAihDtu0f/Pevo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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