Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cb157d5828dfac12012c584dc7eb14d6472096cf456d86905eda151cdd483da' 
  AND token = 'hdOupDyW1sDzRsWwL853QhKOlYBIEPwMn8nlX6GG7FE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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