Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e8a7ad3954cb71d60d63dadb145ee3831f2102a4f64ce09dac387030090de85' 
  AND token = 'sdVAA1HCZx7QXM+SyrFuocMrc132bE8IvcmmzYIWnJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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