Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3871e0f6edde16c29ce105d518b7bc8bfec706125a1bded10b3207be7186740b' 
  AND token = 'tQ5P2thcBe/TGWM3fo2JT5crB1mrCfuqGQNW5SQjj4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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