Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c1b4b6e261c81a4d11357ed01c86c178eae70560dad53f9d664b7f172e04a1ba' 
  AND token = 'NxDDwUo4rdGWC3vG612vsNl2W5rKFVXgefKUyUADnDI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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