Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6852e5060f6c27e65c1982b5427cba9a84daaad041e7681dcea81c9ffc9d7fb6' 
  AND token = 'xFJp6lplS3N76lCVhxGovClXjFNFm0uHbBVldAb4GUA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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