SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13b0bff92e5f7ffd7d6860ceb6a045ef0732bc6cb92e09427aa15a05e5017f83' 
  AND token = 'z7U072QAIWXEj8qwNplGBO7LB5uJ3mVVo/pX40BomvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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