Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '809e89a1ef21d614719fbe9f3c32a7977b35b1e445487771e2adee7f9c5d98e3' 
  AND token = '7wyDTzFQqGEwy484u0zNJthfwYWaYC3PJfNfKr8kuUc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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