Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea478f1179256d664ed09d1de711ed00b8a2ec2c6a3cc42ae09140d3478ebf49' 
  AND token = 'FsRIG6jDyaa9AHspjKbY9+t27QviDTWhpKpbfGFkbCw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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