Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bfc8cc28b02db130965989601f6c4afb3379cbd1b43898addf78ee28a23f4f1' 
  AND token = 'SreUEYpOyGjDcEZ7/0/blwReOCY8CrR7nCvY4ElkWiI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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