Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5c07ec94331164cf33daa4a3cf8fa794f480df1aab3ff1a739b753d6e4fd4f2' 
  AND token = 'PqC/cA8uv6vvH9moj2LMQTBkpDZSKflk93UzT44Lzd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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