Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bd258e1590955a89dc7621834c6b0ee7ebcd8dc4e75ada30302697b6deab17f' 
  AND token = 'lUEPETVQ8Wif+vORya2K9Pxi2YCMAUV0ZnL7trpoNXw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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