Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3680342a5c70db901d3616d9082e0cf7cb11d30459f4a66f124e69d72fe28531' 
  AND token = 'n96Q9EpVrVg/taW0lWMVZKKtfIH6EHdNWAAwvFQMFzw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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