Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b024d6892dcb91d0c0a29464dfba1390bafb15074ac158d0f46d66eec43c986' 
  AND token = 'l9UTJg7lN85h+QNSU8U2ddynyl79F+oRBDiQpKMUS8Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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