SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1065cd5d8b5cc866ef2a014a49e3887a90a3106c8b9e938ea639495417bb4ee8' 
  AND token = 'tBhfFK9Yh/Jq2HahBtvfL2yYJ5ht0jQ2jG2W7OrILXU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}