Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a3074eb6907d6a8afa4b31f6edc7a3f3ef92797295f4d0fe1d4b0803df2f354' 
  AND token = 'ZVRIdLfA8XewA+s8U4cPrLDABAX35bIa/b6qjvc85uc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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