Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7a345c75b5b8affc3cc71293dd3d8508ec6051c6f31a0ba68f1728c74d9e4f8' 
  AND token = 'Hr88rNmWWY1aRRgQsOngwjx+5mpeFiEYDf1+vWF+H5o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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