Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8effca637fd7eac01d05bd583c2568d203664a440b8981a348cb4c93bbd551de' 
  AND token = 'VENEWhQ5sgp5ZxqY4Xr6HcEcIPRaGUsDsAxFWeuaqTQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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