Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '298c4a6d6d2383158372c7d66a3fa3158243489a1151c0c2be351b51dc042717' 
  AND token = 'aK66hL43XVcVXAhYYQcxdBGN3fwxojBok3GED5h3OXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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