SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2897d3bf85d5f633afa6386313a76b98f080419e8ba0ce8aca1215a729b19f9' 
  AND token = 'LZ5CcC6wXbQA+ouO/mlF6Y8xFvVdIvmrXelohoZXzlE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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