Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3e6eb3a2adba278b462e55da95a325153dbab145a8687e2d4da20e3e1c34db7' 
  AND token = '06S7jlnuNvHRVhhJ0FcaA8IbcEO3+/Ijv3rIPsxODbs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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