SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48b2f424b42a6c64b90f72732f5d6a7cdf4e09eb13e9648dc5b23886fedeb1b7' 
  AND token = 'BNRlPehsMVQ9GZMvKFyvNgiIrb6UfWR/CMwqhYk/y7I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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