Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '984bee19e4d056188fc2465a4f3acc3c23995308fb9200f78191af9198a0cb53' 
  AND token = 'wMu4D3d0esWlAZaw3h6wbw4/JFX922OTbzmmDgMcm2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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