Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32528d70cca3e84f2d771f1a14bec6bf8f9dfabec8b92f116ec989e5bbc391ce' 
  AND token = 'MQeGkuQRhRCd512VAdfgvrnTwFJy+pYh9LFaruJtryE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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