Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5ce14833313b01573ee802d3ba4092c096daecf073e274c8a7227e97d4bf730' 
  AND token = 'UNFb8HgYVme9reuOmAYk46DJZlXUnw5lAflilmdcsdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00067

JSON explain

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