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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a65610f6fc5f0f7649783df92bbc035d4d0f3e8cbe3bd3e46d38973e8672be9' 
  AND token = 'NTn7q1DwW5BQJrUeiIoQhU0zIkYtf9PpgFCkGu1cexU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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