Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15274d65ade8093f9720318c02083bd7cded0225107e81f798426eb54331e82b' 
  AND token = 'IvfDJt6pZag2zsKsnz49NgbKHNdxjrf8ZnPXAzeHyAg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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