Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96691461a1aa6820b6cf536bcb2636c4f9efc2e98215f8c5321755de08956c8c' 
  AND token = 'DuDNzWFmXhMEkr3txGMQEx4ytNpCJtXYOyy6fEXfsI8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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