Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4174d807aaed95967e5fb1d5cc7b9cf74506bffcdbecd20a23f6acffd81ecb47' 
  AND token = 'tIx8bGV1J0Kxp/wADhkX8AyJsTGcZSCI5bpvxnmbLQY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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