Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc35cfc870fdd5388f0db51f389595abb35e0a50a2c476b9b69f9349923c26e8' 
  AND token = '1aTZU0bYXYFKKcCZu4WrwEsDOcpE/m4fNPZvwEybuwA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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