Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c33bce18315b2bddd73686fcbe921641058da133ed7360edfcd9d459db0e13f6' 
  AND token = 'ES0wp9h6B9BZX/LFCJXukTwpcPy5LtU+sWIWc/FGm20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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