SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1f48219dd52e2816eb131332c7b5f24b66708501fcc317736749e84ffbfc6be4' 
  AND token = 'JAK+La0n62yjBhDCQgWU7zC8vFGEeSXkizi/9m4uIlg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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