Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9598ee490c602f8e178aebc324afd6129240d7ef71d5630bdb87c8684dbb166e' 
  AND token = 'pTHfpEkHZhy+BtHhl5IeJGkgrq/4crkTOyitChI36CM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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