Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '670af8b87966068721472904dcb2bb22a23f2bd3fca2292e36d29f877ad1b59c' 
  AND token = 'Td2fXUvwDXbSLE2EELbE8KQE8WmtnkMkjOdMZewFrs4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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