Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '801955aef9d34d51dc3ee5e375559b681e56a6872736fd006e13c2c3bc49b4c8' 
  AND token = 'jx/wi5DlzdidM6ueNv3HbUBf3VjS5BZnnxn771REgE8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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