SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b2cffadada28cf7d7b91e462258110a6d29027025f37c54dda384dba323ff5e' 
  AND token = 'p9TKyPoz0i/z8mbgkwzE3TfzwE0MVxoI8lCLyvk4nPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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