Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '269ff525a0e44d626bc5b301eaa9fd8dc386ea4276258adec2a7b5bad3aaef03' 
  AND token = 'F5y/QMegpi1G0IyE+RelXgCGqzGxLDdzWx03SKQzGMk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00102

JSON explain

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