Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e330bc6e69387f5432e165387339c7c2462bc4c9324397e01cb7143e93ad0232' 
  AND token = 'll2hp3yaU5WGcjG87IffXXlYrxBJHAeVQ3k4j+Sr8TU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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