SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aea47039d0fcd4be505614d2355760b08412b558f53dee8f91f3351ed0ba6cb0' 
  AND token = 'kzwQL7EwVzv6iBGg/RUaW6h5yFNHOGn9jb3Cq+fWPww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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