Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec2f37862908f71dcaa5e6eae3a473cb41806e45185bace626449660a8e6c5b2' 
  AND token = 'senXevvy3YZDbg+ovjkmfIfhPUp/FJxcKybKDnxx4vs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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