SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aab07b403622dd51f63f2deb383618b9e9e772d59a5e2cb5caf7ba0156fce10f' 
  AND token = '+yViefhVsruOgCvFQ7H66HfJ4tg4EzOYTGUc+3WZQUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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