Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '011780ec2c3b3075e896f93f0943aa4548e9c356340ed5504928835f3ab45d0a' 
  AND token = '3PqWABq2gX1e1gTiGHXBVxdZWOm8otI4MjVaVMWwhoE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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