Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b13f7c152d3df4a03df97e49d4781f897384a773d92d181916213b6f3ead2bd' 
  AND token = 'eb76lduP4RpLMVddT76RXnmarw4Z7LKdq7OMMHeDfEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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