Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfa0897f448991f20bb39c456b610f7849de90f1eb9ca35cc5d3fb7932c6f436' 
  AND token = 'bHSBhRw/n21/7jmy72aM2YSQgc/SfevWorbMzdmQCgw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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