Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a2eb0bbb451dd09bcbd892cffdc55a1daaa4def2883a52c35e19cfab7e49b30' 
  AND token = 'wBms4XXX5dA3+c+q4uBh6i8dwz56qUUyqMSZWIUzpqE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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