Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00ac0f8cab3a45688f74578403e040c3beb6efa3e81f87361c8a2e3d30849d04' 
  AND token = 'NmI6eSNtlcfbMzUN1gPpQjDPcwx5V5ox8UkQivFQ2Eo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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