Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7922402ebc6eea9d138e55338158f7b2d70cf39cbd5ae3e8aa94fa3204719595' 
  AND token = '5nTFGeoBLoWNaR7s3s/AWvekBJlsRgmf5Db4tp7bffw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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