Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c1ac7fcd16876be596693b5435126c8cb0f6c070c907d7e79196527ec08b408' 
  AND token = 'SlmtvabpTJ/ctENSU8jemAP6kYq0croxjV+NyHZ4TFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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