Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ddf81ba4ba2a4447157df73888027aab1c3a376e9b7cbeaf7417341534e8525' 
  AND token = 'EAydafoOqzNwKXsjPBwmqF0DhAZrzqyr4xEuJFrXvOQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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