Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10997c9a005a37d7d8b88929cd8ce94303235089d6e5d6de5f25d53af08f52a8' 
  AND token = '/ljoGhfN7dDhibsPt8ErS6uXAdNdQ0ofdJ5ilHwNE4E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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