Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a0a821bae8a0be332a042f28076b45bfa61cd1505e154c79d0741bc693318a6' 
  AND token = '1iF6RTFrnoLBMAVUOXbibmiNdWuAQn6qDml7JjgWRnk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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