Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3cb9a11f8b2f1dcaa198a640218864e12459358e9f18dc87eba2830ab551e37d' 
  AND token = 't1IqC6DwKDiT5mfN3h3URJ5rbJpiQTGoZ73DdfYkiKg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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