Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0df317215e4c54e9fb36e46d037c7e2c5de2b40886a12502c996edd077d47c6b' 
  AND token = '20kMcQuHdQL+PCU3Sma9P39CC741ZXhecEE8na/9YCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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