Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1e4baa3f07b9dad2289394b3232bf0d9cc517fea11efc285c5d28ec25bfcdbb' 
  AND token = 'tbYMRbo9FF2m0j/I3AaFOM8GzK6ZU4tsALRve0jqnt0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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