SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e82f3d7a2eca9bf3d2b3eee381a6d3c72d1184962df317fdbd7aa9b2e0f4aac3' 
  AND token = 'JjjBEgDxhGtuRCqrSwzKNNeABJV2Ch10VHJcww7BinU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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