Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e192703952e5201f03fe66f898399b50b9bae8cdd4e019081224c69a70f7447b' 
  AND token = 'iKV815ibIsvI9oR9p4s9zwkhOU+0Q6nvbSF2I2YdI28=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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