Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9f84e60aa63ed6b4b9f184d56fc7f75565abadb2de0bd76e509fad57f0c3fa3' 
  AND token = '1pngvwJQ9hpIx5sbh2QH3wAOmEeKwEwpumzicuL9H04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}