Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30be3e469877313043abd7bb825a25887822d0937fe6d25857a83299e9560e70' 
  AND token = 'ltYMDsOUstpxu/jZLm7x8BVoBIwsr5H8/ZU2+4WTQoY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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