Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0f08fd96f99f6692450f82e276bcf136b900ec83185e25949d8ee6124eb4336' 
  AND token = '9Ezr1tHXkkK2qL/ircru8hkmn87Jxu+oapIhNbA+sgU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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