Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3fcfb419be206caa9af8b9398f8063befeae2accbdfb3b8bb05f5a92ec58258' 
  AND token = 'cIqM+DcESDlhfJSP5Mht4+Y/PdMGMIT8oo0ruuEUAHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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