Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9be57dfce23c26127e542923fb505ffa0d68fbf8b6f3e5011377fa06a2cb9515' 
  AND token = 'H8R/W4QrkEoDqi/HTyIC8n9slFMwghHkY0f7bkXnyk4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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