Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b0e59e5aa9a41f2b6f40cf1dcf23abf4a88e76e2d488de93e629fc33715a6ac' 
  AND token = 'HxKv6zjed1QDuvzJ3PL5aceqgESHIqptGj9P6g7RyZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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