SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5ccb43675ab6c8d3dcf76f276b91b7b6007d6a9c92f9a42d2181a6e41ecc4a6a' 
  AND token = 'bXUvXLqpv8o1lIjvO4B+XhPUW9jLd2QJAcH3CcYw7ys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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