Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7920cc2ef68957d06e22a845274bd97d301e4005c4a0c3cc258cb60a25a3280' 
  AND token = 'wO1xtW7yBQX5GErgbET/XLvLfKU/x4Sz0O6hJHsMXoM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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