Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccba4ee0bb5e93b6e81bc26eed449623088f4feae0237529ab6f81b7506eeca4' 
  AND token = 'WCmzNskPVX6yXL9Tn5AWfdjt1pf/Y7ZqYN8lPiO5Ewk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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