Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '528c319ca26360e6c8ce1999afdd74adb00ac29a36fbad67d05076d91a0ea0bd' 
  AND token = 'M6r9+5aaYVtqmUwprvecdMkjX5P1hau907FRQwHZC0E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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