Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c17a859eb46e959e15e4bc4d198618bb49d0b506ce6e74ebf8cf23ede0964a11' 
  AND token = 'c7iqY8M9qUVUy+l9r182BSeF5AggNVHmzh8EfLFN7ew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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