Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02d89f50254aac0567e6f71e5060d5a0b5a4f6fbe4c81ef90240d4c2c7ce3f25' 
  AND token = 'Mrx/yodfl+7qO8Fm989SV0GSMrsjzxyFue/bViDMkqQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}