Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e12813c548f6e0a3bbd763a5132b661e308b9b6e5fed2a1053574c9ceb4505d' 
  AND token = 's2/B9baLRH8cUtGgZGh5kEgbss1bOSU5d3O0h0XYvIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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