SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bd47178df5d729bcf91b781efd582d6e93b5499b1bf565bc4e70c31ba6ec89a' 
  AND token = 'XDhpAIPWvWXKPKiHJt3kY6dh8+ZJJ999XH1thwfGYgo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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