Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3cadf016aa0216f5f392bab9aa60811e2d127f5ea3cf825c94772632be436ce' 
  AND token = 'eAMXY3AiQRS3/0ezC1VJDlGIawkfIHBQ0As3FVCZmSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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