Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cce0a73753bccef27886e7990d5acc7e234378d87d7d5e71b9da98a06915465d' 
  AND token = 'uu0EFIG8nIHgF/Bc4uF9kNBs6DdmNu+ZxXXgZz9pNFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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