Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e73e4e996fe0e2e8a6fb9f679b48812c783ac00cb43ff589b1fb1b5027ed82f' 
  AND token = 'GZ60v0nasdnTTXZwm3iLmx5vvagwerz+AXEoYYcz+aM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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