Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd24b7501ab5713fd0d8a3634d06b062134c14bc07e72a60901d88a1fdd123dd2' 
  AND token = 'MwhuYkz1MCTzuQPgZ5pq9tAK7y6QXIkwOoTL8jLmqH0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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