SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ecff19800684272b1e394fba5926d03860c0ff87f594622fb3b8f2ce05fcfa3' 
  AND token = 'Ud3zz7aXvJGzAKhgLOEd/Yllv4N0kmovfJBMUpGOZEo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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