Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cf2ac878cdab8585a0885650c6180f17f988b6a0d200aca087bd5feff47a97f' 
  AND token = '3soyvsvJ3XTaQVSv9it8bFoX/OOZRXIVTUNSdbETAQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}