Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86279e2dc523b0c5612ec9d607ae107bc9e558ce77a2c069436e3f2ee9b6d56d' 
  AND token = 'Wx5F+A13fS+TKFpLfpI7pRyKLCt+UAbfnSH7/07uQaI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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