Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7725cd645cdc5d17d0c7d6441e63638243a1e0ce5a61bcf8d3c3654bfb45d14d' 
  AND token = 'BOymqx5n/HHcouu+jDKRe++KpgoNCWaNYe6MxV8owtc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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