Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb6a4a38c29167955128eb310fae201a983ab78819a011c8117f000019094004' 
  AND token = 'sr1jIGe7ownJ2JdjT9ua4uZSjAxBoiXdn96lWf9sKh0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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