SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b23cb1ad5f09a326f9aecfafe85da7959000a29cac364f04af222f6d8ba41ef' 
  AND token = 'vhIJt7vVdjcFxmtLz8j3WV/hDyPcB9GK8O+zerz9BpE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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