Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c43a6652d7cbf584fb1b487232d49d1d5dc42ab668566d5d30685fbe7effc05e' 
  AND token = 'TdkULE+N7ejh0XW3UWjtSrOudoI9SZ+ecgGXkWo/dYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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