Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a6b75a5b4617d50e5843c71a0b2491497a6046fe0a7d0b7c429a5cca919ebe5' 
  AND token = '0NRcQCARIHUkTL2kmKkEvdtzgcYAIAQG/TO7OrryExI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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