Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13a5d03ae44716357ad2c66f5672a89c18cda70c7e038817871de0ad4b88f909' 
  AND token = 'ZCQyyv0Iut+ESb3uDk5VC8+a4pSHTxP7GVZYbS4QWx0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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