Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbc3f6c76df75fe2c2189c4e781bc86411f2b2a555a0a755c6f0d8e016e6a990' 
  AND token = '9njDveHHx5T75sKvptaRnLcoOe0J/LYOGXBUg4j0LM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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