Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11f9b99a19464c0f357662141d29996f5691f5cf9e0acdcd50f4e0502394dea6' 
  AND token = '9zhQPu+sIO7D0/TtDUiCMueZt5FkezWYFS7eMrzBGbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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