Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1972da44c49dc881e4b5f88a495c42acae2299b801e55755078adbfcaa09c587' 
  AND token = 'padKHbsX7rCBUS2iD7FVFzy6V+PyyZY5QIK3MicgYYU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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