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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69be0fcbf5a5baf9f9e064c2f72c1fd13cfeaab8400ab8e0a44a613016c7ecf0' 
  AND token = 'oXwT99kHGl9dVuQQrxJIeuCICTwF3PS6t1r8WEsKpVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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