Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be7f66270e65b0d3ef901c87a5b34e3b5c10eefd2fefd926dee80470afd594b7' 
  AND token = 'vlqVOAXctr0Gkx/B8WzgJQo2XSHXBEyJ5Azoq8gpVAo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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