Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56baddff60db095a8ce191075c04f1f06f92c7f5cc3aa13447675f8913efe1a3' 
  AND token = 'QwRcuCAfsCwVrc5nQdgrrNxAuFdJik/ZSgrEQZxG34g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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