Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cde5de5561f857648a1ce199a9f2620cd28ee3e63391b86eae75a6dd6559b144' 
  AND token = '0DOhkTsU6yJR0aWTMD7Uxkn0uepafnVRT0vKBapfLaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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