Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f54ffd00032b2a41f9a9b5604f8b64345625734ed85243d9bcb6be8096efeb7f' 
  AND token = 'SmqcUs5SeZadOZsDQ8U5DHcUrCY3Hw7UJXQJE9GgbkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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