Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '660a32374538461d634e4428a18bc8d329407da190f3cd209b697a2d3b7f369a' 
  AND token = 'Plnlnv6D2ciMzijMHarVGN99HA6/P6H0UZPKrb8PLOY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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