Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6aec413a31d53c96886b93864e1c68264ee23163a364d582da8988f86b8eae64' 
  AND token = 'mOienKs+xdyZQsB3gX7mTZZpuojxE4K9cXWBJbAft0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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