Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab59244805443e5e4b03f070d2189aa28bd374101b3237626d20844d97eee53f' 
  AND token = 'Bukez2hXyFiUhe34JbS9GKrb+MVJvx6pQH7CqbMbjCk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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