Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ad69f1a922f28a24ad03b04e0b98c1f5d461dd4594b55f7c748c4e066b7165c' 
  AND token = '9yKZUthEfSIu7BYBBX9h7qGNLHhYEJZcRooGQh7HrEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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