Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8a803b7765053d60079053be6c0e630febaeccfe8f7fade2577f0b5ed3d7d2b' 
  AND token = 'D1dUZSvYY5cga8R2VLoUO9PMwAiLttN5m7DXu8JLzVU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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