Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6fae197a3f9505e5a41e1b91f34f6c503343bf78a9fd5789166e4da91ec891cb' 
  AND token = 'BAEOYjs3tAeinuZ4jqNL/NTYT7vBiH50nySwnAz5Zzc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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