Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf67d65edf2a9129823d775321425ddd7cab0382831eebff27a381066178d974' 
  AND token = 'cmZe99RpJG+D1uSad2BZ0U8nNueND5S7d60WNFTrVfE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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