Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23f52682ec007c9063995c6a7c29a350cf62e67af9cad2b5d18fff7427ad080f' 
  AND token = 'x90FCiW47b04OTfOcHFalBJmVhpNfwo66tALeQnxw5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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