Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6fdb6d9ee8ad6ee58ddd6d65bb2cfc331b2599025130a999af274ad46b058987' 
  AND token = '/wKKkXyJMZRbjUJxuH0FAjwsRX8I80y70GfFVHS9f/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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