Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ce3f1ad52c0288888fe87d42bb4227961b41666ac0da8aa08e36ab5d87ca3db6' 
  AND token = 'Uu2bcss3l3A4AVQ6OTrgN/xUKFVvDbBZ6J5FSUnbPSk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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