Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad3c2df640ac6759bb6d7eaf11109c18eca27725812e344206f953aa24020ae4' 
  AND token = 'A9KK0zoBXWnEwJrIbNufrur0TUWWVi3P7AHPIsyAoaE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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