Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba86eb6204ff9d4823da75565eef5d5dd3e6ade2a83e736f300ee59f99ac334f' 
  AND token = '6UKCXuCC/hqeFR3yRnWwEwjNqPL2c9eArV2Bpmms6bU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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