Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bef38cdd1cecd7eaf503fc529c3da17e2e55cfaf79f0f7b08fb9fd2953e7e9a6' 
  AND token = '01EL8BSOsoweU583e/O1pXA8xeMwpE+iAvwJJi19wrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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