SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af8dea20b74ccb739ff743b9f527eb3c4a21a4c873fb6951c3c86346d969a821' 
  AND token = '2Kd6qyz3MHlH8GxDjGeAYcgETGr40V+9/hjFa+WfjB0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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