Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a92c935517e3c6c979112ac24af14db2790ceca3c636db477ccda4018a1d6bbe' 
  AND token = 'd3HSKR5UTRqM5jJJdyLLZ9LYRRezWrfSAzCFLmkEldo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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