Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b874289a64fddcb9f25a282ab5be29b203d66e664759db4280130b8934ebf4d' 
  AND token = 'ONDZ11H6qpRcR4WdKp99UDp645FfwfM9SHMpFtYxUzg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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