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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1130c297c3f03da9f9b1c86e08767719d157bc96547ed7721bc7705fb8b318b2' 
  AND token = 'YamehZBhVKzjcfBeKh7YhgfhVqy0UZzZ3sbHb9GGQeA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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