SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72195e3a094d757724a58877a30fb5efa5ca9fb04b2a8c01fcc6dafd1ba6e5b4' 
  AND token = 'ngCJ0Y7Owu/npHBpS0rwrXD6Ud8S5F4gB5hHWyKTzvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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