Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8613a3e5b567aae3f3ecc7d6cf0bd96cadf3d69238b5fec2dcec851251782934' 
  AND token = '8QTLExTEIqNE2WXZu3hjrVvHDnq/sEWEg2v7fzBOPdo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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