Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '000960cd8e73884e7729d776d2f8e4aaa5d8b85f4531f8a3cf9ded9ab0adbd0e' 
  AND token = 'nONiMvIbm/hoeQ1ngsuczAklIsJsY5iVSFiUdDpu9+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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