Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb689d802dda436dcb445f47aca8c4baddd09952ad96acac7319e2adc0cbf627' 
  AND token = 'JtS0Zu783Qt+aAnqwauSx2zQ0OAKbqrdNvi6AqXCsgY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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