Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e9eaf6538b6f2dc1a81ad9276856a3d5ed2b250746811048e67221b7b857c65' 
  AND token = 'CZuQD7OPgClazSRzPZqbDRdzuTOW3P6XyWwkC5m1WUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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