Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a381dfa037f9d925c5006862d0748f7dfa4457acc898cc274bcefc4ecacd362e' 
  AND token = 'VTwleih6RJLOTTVhsGjrMbBJOMhQiEymZX6IuePHqT0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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