Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'daa2b89f1d3f85c6ddb83176d37c0eb4141bf890f19bca476879d803ff37da19' 
  AND token = 'Aw7vpNt/IAE6NETFuqKMUtCxsPtP3roEmVYa4kLEP8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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