Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '910bcd47cdb45be1d9ec2541055b64b3fb08ad584b70d5a4418dba43a6e3de5e' 
  AND token = 'zrLioBb9yJtjWDNdIEN7+UyaXcyOeBImqaKd+uA2BsQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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