Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41f6764f138a20f3f3ead77379eb9cbbc474ad5bb50a444c78439874d766f1f9' 
  AND token = 'EUrgN6BiBdBVIFD8/AnjsotfvzPIy3rKhtpctZbotCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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