Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0c6f40ea9e6f13420a54026bf78e6b70e95fdf9d88f8e42a508317393a09ea6' 
  AND token = 'HK0WSB6XJJCP7LroqMlXMEjf9HzfjQqkxKtS30TR6zs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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