Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dcad91b3b3a2856d8a5a9e3ac59da6d88fc575e8082eb20b81c223f23d1c7f18' 
  AND token = 'VdquESwNax9RtVFrNStxsQnYIoLh7Ktjlm35sCgpSKU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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