Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd96614e3b5f151c9ec4e2ba79c882c1b1e4a02df50f11d7291a56c525ec216e' 
  AND token = 'gS77zdpHiBM3xGwF4Ao0f6cEiaLOTf9LrQs1V6juRQE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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