Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1629ff6de5c49a26d753515ce0323fbb8606718115e597bb98041069a36a5ec9' 
  AND token = 'z7Nvb5LvSl2pVY7jjNGH1fuNHo5YRCoytgfOMk7S+JA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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