Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1be357e53bd62addf7b6539fd63e14d4a9f461ac451ac0672acb2a755746211' 
  AND token = '4cC10m3hTd2dZWwuUpB29Fbv8klTJiJGDdcS2nz48GU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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