Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63714a57cdea4de64b9d154158a658feee183f8e140df6f729e1ecdaec72e912' 
  AND token = 'LHZ3G8/sgp7OXt3u4AsADj9LFgby5i4Q4hT+5qtolA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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