Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff282f95ef0c133fe0379ff6621df2522b7fa4a959b79c63d39cc684cf1ac9d2' 
  AND token = '4MNtX979f1DdgBkWF/gbFaBa36akTAczX5YwzYw6Hdo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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