Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '843fe89b477e5ca0e94fdb271eef38c293a0b7a9f13ea692784fa3a49e0d5af8' 
  AND token = 'm1x/3xjgyDHIbmt2dGcpg9rUPAudPz0aKY6v2Fy95Lg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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