Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8be14ebc563ce6c49a0e322f3df05ad02c8200c52326460febc3a9bbd55149f9' 
  AND token = 'wMEtHE0sIoMjTEIxJvRtlWH5BOy4zalpV1pefiUU2Jk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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