Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d3c533336aaf59c979a432d56d906cdfa14f9bb8e1d9531521a9b58e107a11f' 
  AND token = 'KurO/kTeSeL52wR4OCdEQtdOhzgSPjTx/+6LRf2Wxt4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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