Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ec9c99d9488e8a403ab90cc72008923dee9a4524b02a67a2c62c897d1dcc054' 
  AND token = 'jCBbDkQfO5zuLvPyX5QxhRPsHn+hFY9tdUC2Jb0HspE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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