Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f24d76e58df1d59a159e604493528e2d744f99edfc7c36f73a7c15bbf3a8df4e' 
  AND token = '4u2BvymBkHol2LPVEu/PT++DDyL+CeYfo7Jtjcu1cDg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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