Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '848db23430ddcbfb3be2e92014337bbf11aaa9d86ac3ceddd5c35a3bf14e822b' 
  AND token = '+iIoZnzKytGBuwBwCh0t+TshtPIUzfXDQJufd8wyhV8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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