Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a63240d5206003b7fce6bf87019076c5fb0d67bc1cbfd7f30f287560dd1c39f' 
  AND token = 'aJodoXG/kXeq0l+0AbAfvNEfPIl7VQj9rz5jpZMYOYA=' 
  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"
    }
  }
}