Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e538e8e79b1ed06f35337a57188b68c024a35317f3ef8f85ee7c06853a1fe2d6' 
  AND token = 'KcwOVRl7edeEzZKJGgHeiNI5hM9xG2l0JMswwGZdbnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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