SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f441bdcbc47f169ae7396a8d1e29f3a2c7f796dfcc4d43efc98a58ac868b968f' 
  AND token = 'LsvjEnZv8Dr41RLoEVWBbahpGDIXkhAh/JRKKAUFJZ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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