Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9f9e5ae03d7c9af3c648301271143ca77f962a455bbd4525d55bc4c43d17a76' 
  AND token = 'wnuDI1q7B8p1ev4ODHw7nycS1Zrt331gJFNhiQQTp8E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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