Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47473e8959a637f816a5029b0ffd38bdcd685deae6bc5e92ca84961d15566f54' 
  AND token = 'KtvA5265l0Odwqk7mhLlLJ/NVbOx0zAIaaLLpo8KPzk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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