SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '778bca6cfd8fd442ec1f95d7330ebb6332bd9d9a011cc7753dde152a322b0be6' 
  AND token = '4hg8QzTM4h8m+PKAmPKU4N0pdhQFJXHUOQ6KdX94loo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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