Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3af8857ac1453018f3fafcb44b48b58b32c7f0dfc071af191fb338948decd997' 
  AND token = '1oNI7gym0gcfQ9rJhStERu6vJnQ7IAzwrwKyWZ4AR70=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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