SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e3aa4d0ccdb48dca178ba20933c6be70bb54f5439209a4a9ce78791bda6a56d' 
  AND token = 'NlfmqvwX7ygOMRY/h0vYWdX6QSGSndBKgVAQcpBu8Nc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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