SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64beb9cc39808054da487d85b9ffd7fd93b7894819114ac53537e878a32d27c1' 
  AND token = 'NGhImy1RFJ9/DX1B4g+lWvBziqapkC2jGdWeoXU1dBE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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