Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d835a012dce8b891ea001b623012e125c8b1df9c75de5f2077368f90dc1d829' 
  AND token = 'x8wJjb5lcQgrSwkrfLjrP58M7dOrW3hfGq5l3xcXREI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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