SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01d364260bbbd8e0c94e4b8c80996178ba994f745cd7a90e6fc93f3c3da6ce3d' 
  AND token = '0nrzZow+aXK+UKDbBzzMYuiu6shJzkRjOn6KaPyqGhU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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