Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b4936c31149098f7339f5ea3d5fd7f86bf2b75ea904037e1cb3ce7a4c0dd565' 
  AND token = 'B3o51paY45XnFK+slqy7SPXpGt5lF2s6Em5CrkhKaHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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