Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d7b86ee5e3b6a0fea38fe091bc1702815a6fd94505892d9efeb488371032040' 
  AND token = '5SXyEikcIm/KolWtz3EJvZTnpVNZE8XEq9XY19XlyvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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