Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3a8dc75d79704bad348643f31f7ee2a5e89e1b0cec7d012258d4932d6f63dda' 
  AND token = 'pagjjVN/hXp4v2sFlZIyNCKDFM9gPtBc9K91te6vRco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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