SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e58129088075d9c8439cca1b841e7eb62fe39249d5161405c71287fc473ed506' 
  AND token = 'ogcjT/eQrzGTjAeMJRKDAl+95rInUqlU/bZBsiKnVLI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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