Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dea8339c387e504a8fe506c6dd9ef3e3cdc6baf35e719c18279059893e4643f3' 
  AND token = 'QwPL5x3ugH6PSSEOpFNjdZJGzJCbq9hceM4Dee7hwc4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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