Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02f6d43f7c29ca3c39397b3a96bd0fed474ae75eaac1b0463277e21429f0c003' 
  AND token = '//HjtHjxYhoxAuBXsrKEJiowWE3ZSHo3qpCWXuHAZDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}