Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6a7af90ddcc2556cb240c678cb33244915d69161004dc0ad692302f09a2bb9d' 
  AND token = 'RdDr+C8jp2jDMNfTgnkaFtXzPW+Ns0FRSp/PutkIs2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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