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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30123ebb2e9e8e99a031c4b56ee832e4a7e99c099322ab70b1acc2d8b2360f58' 
  AND token = 'WjM389Z9DErJY/WJ5PYhEYHPp/3FtWAmGtCl0n8ZJEg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}