Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d3638b6eac9caf64ee561b11f7ecd22062b5426f67eaad84a769dcbafec5b69' 
  AND token = 'vwFXq3eBT8sLuMQfPLrkY+CgufryXWP7DJEmx3fjBAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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