Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fc91141edcb8fa3baaa26b4b0cb40de7470c83598d7ce48c1964aac14a6e26a' 
  AND token = 'WLKKlwZKQFLnYhO4a/2UWSEBt1bXGk+q98E3avvLF+Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}