SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bcf91c320fb90539dce8f1d9bf4b79a342afbbb235729d7466b6e479b6e004f' 
  AND token = 'GmGq8MDSUBhVXWw1lcR+Jsj3YtsAmColLxs/+7Vt5u8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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