Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bde0fa545a574c591deb59978aed9b81ab6d4f7ec9861bf312f791711591a22' 
  AND token = 'cQjuKYEOwYR9TK6AvfjaT8WuGmvd6CdWS1uBClGdYsU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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