Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49ac4185587a8f7d07a6eb5a751a7d2fae6b6675d90fe40449812f4ed9fe3dfe' 
  AND token = 'xggICsuunX/NbT/UIJEJHk5EEX7wJBkqwdobtm70oKQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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