Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5863e4c9edfe61c8580ce33a82fb0448d50f698309585de90e458859fd2d841d' 
  AND token = '3ujxmso2JMlLAQoendORnc1c2F2OYBoNWKSjkO/icwM=' 
  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"
    }
  }
}