Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '928be1074b65a3f10875b1cdde86f3ff1e8884c6857a60d33e3d4a58fc13008c' 
  AND token = 'nkcbi8Es0cq5FeeKm7VkbyJpEC0dFabdhPW8AQmLiGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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