Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad3e4697f48812f32c5f780070bc3eea714f899bb9e5f20b1fadd2dde71baccd' 
  AND token = 'IyRL8hRC98niLXPxHC22NXQIcr0tm+MAtvlaSAw7SE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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