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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5831612c4a65869ea926ddc5eee4a2c40001bdc8b9eb7e331b4a1773c69e3c9' 
  AND token = 'aNRTMALk4epkrfudDVougyl+KHdgoCHVwm468al+Bgw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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