Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1f5bf0edfcc52643a7e62ed09e08f0eb3cc34aed3908c2b111aea26bab6276ca' 
  AND token = 'EcxnwproVDIIu4GtbAy1rlHOZV+mzGjygFB23cu3pQk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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