Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d1a8c566b23b0ce8b9218e156f4a48e316a29f6d2ceb78d50062455cdb74b94' 
  AND token = 'L93Wa4QKFlMX11CTuccPEll0+8uCLkSxgifgnO8DpYA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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