Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b9401b4caad9236954195d50eebd95a80a104f00ad0708f510bcceebbed8f91' 
  AND token = 'TPbQ7NRVOLf10s2S+5QZxyd5RuTlJ6/vCiR33T21Vyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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