Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46cd667e61c82ddd09150f8806b5c229bd21a86fbe7283b24f9dd7e023afd92a' 
  AND token = 'tBRkTt6fVgqLbxg27O1yijuerOIgGVgqd4Ce8vUIDGs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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